In visual studio code, this runs fine.
What is supposed to happen:
1. Load text file
2. Split it into paragraphs and save them to an array
3. Lastly it should log that array.
What happens:
1. It loads text file
2. It doesn't split it by paragraphs.
3. It logs the array of a single value to the console.
As you can see with my experiments, I've tried splitting by a space (which it does fine) but for some reason, splitting by paragraph is giving it trouble.
Is there something I need to include to get regex to work? This is on Google Chrome fwiw.
const readTxt = (file) => {
var rawFile = new XMLHttpRequest();
rawFile.open("GET", file, false);
rawFile.onreadystatechange = function() {
if (rawFile.readyState === 4) {
if (rawFile.status === 200 || rawFile.status == 0) {
console.log('Book Loaded - Success!')
var allText = rawFile.responseText;
book = JSON.stringify(allText);
sentenceCollectionRaw = book.split(/(?:\r\n){2,}/);
//sentenceCollectionRaw = book.split(' ');
//sentenceCollectionRaw = book;
console.log('Book split - Success!')
console.log(sentenceCollectionRaw);
}
}
}
rawFile.send(null);
}
<html>
<head>
<title>X</title>
<script language="javascript" src="CommaRemove.js" type="text/javascript"></script>
</head>
<body>
<h1>Read Text</h1>
<body onload="readTxt('http://www.gutenberg.org/files/120/120-0.txt');">
</body>
</html>
Solved!
It just didn't like this format: (/(?:\r\n){2,}/)
But... for some reason is fine with ("\n")
I'm curious if anyone knows why?
Related
I want home.html to load in <div id="content">.
<div id="topBar"> HOME </div>
<div id ="content"> </div>
<script>
function load_home(){
document.getElementById("content").innerHTML='<object type="type/html" data="home.html" ></object>';
}
</script>
This works fine when I use Firefox. When I use Google Chrome, it asks for plug-in. How do I get it working in Google Chrome?
I finally found the answer to my problem. The solution is
function load_home() {
document.getElementById("content").innerHTML='<object type="text/html" data="home.html" ></object>';
}
Fetch API
function load_home (e) {
(e || window.event).preventDefault();
fetch("http://www.yoursite.com/home.html" /*, options */)
.then((response) => response.text())
.then((html) => {
document.getElementById("content").innerHTML = html;
})
.catch((error) => {
console.warn(error);
});
}
XHR API
function load_home (e) {
(e || window.event).preventDefault();
var con = document.getElementById('content')
, xhr = new XMLHttpRequest();
xhr.onreadystatechange = function (e) {
if (xhr.readyState == 4 && xhr.status == 200) {
con.innerHTML = xhr.responseText;
}
}
xhr.open("GET", "http://www.yoursite.com/home.html", true);
xhr.setRequestHeader('Content-type', 'text/html');
xhr.send();
}
based on your constraints you should use ajax and make sure that your javascript is loaded before the markup that calls the load_home() function
Reference - davidwalsh
MDN - Using Fetch
JSFIDDLE demo
You can use the jQuery load function:
<div id="topBar">
HOME
</div>
<div id ="content">
</div>
<script>
$(document).ready( function() {
$("#load_home").on("click", function() {
$("#content").load("content.html");
});
});
</script>
Sorry. Edited for the on click instead of on load.
Fetching HTML the modern Javascript way
This approach makes use of modern Javascript features like async/await and the fetch API. It downloads HTML as text and then feeds it to the innerHTML of your container element.
/**
* #param {String} url - address for the HTML to fetch
* #return {String} the resulting HTML string fragment
*/
async function fetchHtmlAsText(url) {
return await (await fetch(url)).text();
}
// this is your `load_home() function`
async function loadHome() {
const contentDiv = document.getElementById("content");
contentDiv.innerHTML = await fetchHtmlAsText("home.html");
}
The await (await fetch(url)).text() may seem a bit tricky, but it's easy to explain. It has two asynchronous steps and you could rewrite that function like this:
async function fetchHtmlAsText(url) {
const response = await fetch(url);
return await response.text();
}
See the fetch API documentation for more details.
I saw this and thought it looked quite nice so I ran some tests on it.
It may seem like a clean approach, but in terms of performance it is lagging by 50% compared by the time it took to load a page with jQuery load function or using the vanilla javascript approach of XMLHttpRequest which were roughly similar to each other.
I imagine this is because under the hood it gets the page in the exact same fashion but it also has to deal with constructing a whole new HTMLElement object as well.
In summary I suggest using jQuery. The syntax is about as easy to use as it can be and it has a nicely structured call back for you to use. It is also relatively fast. The vanilla approach may be faster by an unnoticeable few milliseconds, but the syntax is confusing. I would only use this in an environment where I didn't have access to jQuery.
Here is the code I used to test - it is fairly rudimentary but the times came back very consistent across multiple tries so I would say precise to around +- 5ms in each case. Tests were run in Chrome from my own home server:
<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
</head>
<body>
<div id="content"></div>
<script>
/**
* Test harness to find out the best method for dynamically loading a
* html page into your app.
*/
var test_times = {};
var test_page = 'testpage.htm';
var content_div = document.getElementById('content');
// TEST 1 = use jQuery to load in testpage.htm and time it.
/*
function test_()
{
var start = new Date().getTime();
$(content_div).load(test_page, function() {
alert(new Date().getTime() - start);
});
}
// 1044
*/
// TEST 2 = use <object> to load in testpage.htm and time it.
/*
function test_()
{
start = new Date().getTime();
content_div.innerHTML = '<object type="text/html" data="' + test_page +
'" onload="alert(new Date().getTime() - start)"></object>'
}
//1579
*/
// TEST 3 = use httpObject to load in testpage.htm and time it.
function test_()
{
var xmlHttp = new XMLHttpRequest();
xmlHttp.onreadystatechange = function() {
if (xmlHttp.readyState == 4 && xmlHttp.status == 200)
{
content_div.innerHTML = xmlHttp.responseText;
alert(new Date().getTime() - start);
}
};
start = new Date().getTime();
xmlHttp.open("GET", test_page, true); // true for asynchronous
xmlHttp.send(null);
// 1039
}
// Main - run tests
test_();
</script>
</body>
</html>
try
async function load_home(){
content.innerHTML = await (await fetch('home.html')).text();
}
async function load_home() {
let url = 'https://kamil-kielczewski.github.io/fractals/mandelbulb.html'
content.innerHTML = await (await fetch(url)).text();
}
<div id="topBar"> HOME </div>
<div id="content"> </div>
When using
$("#content").load("content.html");
Then remember that you can not "debug" in chrome locally, because XMLHttpRequest cannot load -- This does NOT mean that it does not work, it just means that you need to test your code on same domain aka. your server
You can use the jQuery :
$("#topBar").on("click",function(){
$("#content").load("content.html");
});
$("button").click(function() {
$("#target_div").load("requesting_page_url.html");
});
or
document.getElementById("target_div").innerHTML='<object type="text/html" data="requesting_page_url.html"></object>';
<script>
var insertHtml = function (selector, argHtml) {
$(document).ready(function(){
$(selector).load(argHtml);
});
var targetElem = document.querySelector(selector);
targetElem.innerHTML = html;
};
var sliderHtml="snippets/slider.html";//url of slider html
var items="snippets/menuItems.html";
insertHtml("#main",sliderHtml);
insertHtml("#main2",items);
</script>
this one worked for me when I tried to add a snippet of HTML to my main.html.
Please don't forget to add ajax in your code
pass class or id as a selector and the link to the HTML snippet as argHtml
There is this plugin on github that load content into an element. Here is the repo
https://github.com/abdi0987/ViaJS
load html form a remote page ( where we have CORS access )
parse the result-html for a specific portion of the page
insert that part of the page in a div on current-page
//load page via jquery-ajax
$.ajax({
url: "https://stackoverflow.com/questions/17636528/how-do-i-load-an-html-page-in-a-div-using-javascript",
context: document.body
}).done(function(data) {
//the previous request fails beceaus we dont have CORS on this url.... just for illlustration...
//get a list of DOM-Nodes
var dom_nodes = $($.parseHTML(data));
//find the question-header
var content = dom_nodes.find('#question-header');
//create a new div and set the question-header as it's content
var newEl = document.createElement("div");
$(newEl).html(content.html());
//on our page, insert it in div with id 'inserthere'
$("[id$='inserthere']").append(newEl);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<p>part-result from other page:</p>
<div id="inserthere"></div>
Use this simple code
<div w3-include-HTML="content.html"></div>
<script>w3.includeHTML();</script>
</body>```
This is usually needed when you want to include header.php or whatever page.
In Javascript it's easy especially if you have HTML page and don't want to use php include function but at all you should write php function and add it as Javascript function in script tag.
In this case you should write it without function followed by name Just. Script rage the function word and start the include header.php
i.e convert the php include function to Javascript function in script tag and place all your content in that included file.
I use jquery, I found it easier
$(function() {
$("#navigation").load("navbar.html");
});
in a separate file and then load javascript file on html page
showhide.html
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function showHide(switchTextDiv, showHideDiv)
{
var std = document.getElementById(switchTextDiv);
var shd = document.getElementById(showHideDiv);
if (shd.style.display == "block")
{
shd.style.display = "none";
std.innerHTML = "<span style=\"display: block; background-color: yellow\">Show</span>";
}
else
{
if (shd.innerHTML.length <= 0)
{
shd.innerHTML = "<object width=\"100%\" height=\"100%\" type=\"text/html\" data=\"showhide_embedded.html\"></object>";
}
shd.style.display = "block";
std.innerHTML = "<span style=\"display: block; background-color: yellow\">Hide</span>";
}
}
</script>
</head>
<body>
<a id="switchTextDiv1" href="javascript:showHide('switchTextDiv1', 'showHideDiv1')">
<span style="display: block; background-color: yellow">Show</span>
</a>
<div id="showHideDiv1" style="display: none; width: 100%; height: 300px"></div>
</body>
</html>
showhide_embedded.html
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function load()
{
var ts = document.getElementById("theString");
ts.scrollIntoView(true);
}
</script>
</head>
<body onload="load()">
<pre>
some text 1
some text 2
some text 3
some text 4
some text 5
<span id="theString" style="background-color: yellow">some text 6 highlight</span>
some text 7
some text 8
some text 9
</pre>
</body>
</html>
If your html file resides locally then go for iframe instead of the tag. tags do not work cross-browser, and are mostly used for Flash
For ex : <iframe src="home.html" width="100" height="100"/>
I know this has been asked a lot on here, but all the answers work only with jQuery and I need a solution without it.
So after I do something, my Servlet leads me to a JSP page. My JS function should populate a drop down list when the page is loaded. It only works properly when the page is refreshed tho.
As I understand this is happening because I want to populate, using innerHTML and the JS function gets called faster then my HTML page.
I also get this error in my Browser:
Uncaught TypeError: Cannot read property 'innerHTML' of null
at XMLHttpRequest.xmlHttpRequest.onreadystatechange
I had a soulution for debugging but I can't leave it in there. What I did was, every time I opened that page I automatically refreshed the whole page. But my browser asked me every time if I wanted to do this. So that is not a solution that's pretty to say the least.
Is there something I could do to prevent this?
Edit:
document.addEventListener("DOMContentLoaded", pupulateDropDown);
function pupulateDropDown() {
var servletURL = "./KategorienHolen"
let xmlHttpRequest = new XMLHttpRequest();
xmlHttpRequest.onreadystatechange = function () {
if (xmlHttpRequest.readyState === 4 && xmlHttpRequest.status === 200) {
console.log(xmlHttpRequest.responseText);
let katGetter = JSON.parse(xmlHttpRequest.responseText);
JSON.stringify(katGetter);
var i;
for(i = 0; i <= katGetter.length -1; i++){
console.log(katGetter[i].id);
console.log(katGetter[i].kategorie);
console.log(katGetter[i].oberkategorie);
if (katGetter[i].oberkategorie === "B") {
document.getElementById("BKat").innerHTML += "" + katGetter[i].kategorie + "</br>";
} else if (katGetter[i].oberkategorie === "S") {
document.getElementById("SKat").innerHTML += "" + katGetter[i].kategorie + "</br>";
} else if (katGetter[i].oberkategorie ==="A") {
document.getElementById("ACat").innerHTML += "" + katGetter[i].kategorie + "</br>";
}
// document.getElementsByClassName("innerDiv").innerHTML = "" + katGetter.kategorie + "";
// document.getElementById("test123").innerHTML = "" + katGetter.kategorie + "";
}
}
};
xmlHttpRequest.open("GET", servletURL, true);
xmlHttpRequest.send();
}
It can depend on how + when you're executing the code.
<html>
<head>
<title>In Head Not Working</title>
<!-- WILL NOT WORK -->
<!--<script>
const p = document.querySelector('p');
p.innerHTML = 'Replaced!';
</script>-->
</head>
<body>
<p>Replace This</p>
<!-- Will work because the page has finished loading and this is the last thing to load on the page so it can find other elements -->
<script>
const p = document.querySelector('p');
p.innerHTML = 'Replaced!';
</script>
</body>
</html>
Additionally you could add an Event handler so when the window is fully loaded, you can then find the DOM element.
<html>
<head>
<title>In Head Working</title>
<script>
window.addEventListener('load', function () {
const p = document.querySelector('p');
p.innerHTML = 'Replaced!';
});
</script>
</head>
<body>
<p>Replace This</p>
</body>
</html>
Define your function and add an onload event to body:
<body onload="pupulateDropDown()">
<!-- ... -->
</body>
Script needs to be loaded again, I tried many options but <iframe/> works better in my case. You may try to npm import for library related to your script or you can use the following code.
<iframe
srcDoc={`
<!doctype html>
<html>
<head>
<style>[Style (If you want to)]</style>
</head>
<body>
<div>
[Your data]
<script type="text/javascript" src="[Script source]"></script>
</div>
</body>
</html>
`}
/>
Inside srcDoc, it's similar to normal HTML code.
You can load data by using ${[Your Data]} inside srcDoc.
It should work :
document.addEventListener("DOMContentLoaded", function(){
//....
});
You should be using the DOMContentLoaded event to run your code only when the document has been completely loaded and all elements have been parsed.
window.addEventListener("DOMContentLoaded", function(){
//your code here
});
Alternatively, place your script tag right before the ending body tag.
<body>
<!--body content...-->
<script>
//your code here
</script>
</body>
So, I've been working on a page that uses only local files (server is not an option, unfortunately. Not even a localhost. The struggle is real.) and I've come to a situation where I need to grab text from a .csv file and populate it to the page. I have this bit of code that works, but I need to have a file set within the function when a button is pressed. Looking up the file manually isn't an option (to visualize what I'm doing, I'm making a mock database file in the most annoying way possible (because I have to, not because I want to)).
In the page I would have something like:
<button id="myButton" onclick="getText()"></button>
<script>
var myFile = "dataset.csv";
...
</script>
The following bit of code works (in regards to having it pull the data from the csv file), but, as I said, I need to pull the text from the file when a button is pressed and just have the file name set in the script, not pulling it up manually.
<!DOCTYPE html>
<html>
<body>
<input type="file" id="fileinput" />
<div id="outputdiv"></div>
<script type="text/javascript">
function readSingleFile(evt) {
var f = evt.target.files[0];
if (f) {
var r = new FileReader();
r.onload = function(e) {
var contents = e.target.result;
var splited = contents.split(/\r\n|\n|\r|,/g);
for (i=0; i<splited.length; i++){
document.getElementById("outputdiv").innerHTML = document.getElementById("outputdiv").innerHTML + splited[i] + "<br>";
}
}
r.readAsText(f);
} else {
alert("Failed to load file");
}
}
document.getElementById('fileinput').addEventListener('change', readSingleFile, false);
</script>
</body>
</html>
From what I can tell from the API, I would need to set the file attributes to a blob in order to pass it to FileReader. How I can do this without using an input box, I have no idea. There's also a 50% chance that I am completely wrong about this since I obviously don't know how to get this done.
If someone could show me how to achieve this with regards to what I'm looking for, it would be very much appreciated. I'm absolutely stumped.
Thank you.
Note: CORS restrictons will prevent this from working in most browsers. You can use FireFox Developer Edition, which disables CORS validation.
You can use an XMLHttpRequest to load a local file:
<!DOCTYPE html>
<html>
<body>
<button onclick="readSingleFile()">Click Me</button>
<div id="outputdiv"></div>
<script type="text/javascript">
function readSingleFile() {
let xhr = new XMLHttpRequest();
let url = "relative/path/to/file.txt;
if (!url) return;
xhr.onload = dataLoaded;
xhr.onerror = _ => "There was an error loading the file.";
xhr.overrideMimeType("text/plain");
xhr.open("GET",url);
xhr.send();
}
function dataLoaded(e){
var contents = e.target.responseText;
var splited = contents.split(/\r\n|\n|\r|,/g);
for (i=0; i<splited.length; i++){
document.getElementById("outputdiv").innerHTML = document.getElementById("outputdiv").innerHTML + splited[i] + "<br>";
}
</script>
</body>
</html>
I am tryint to create a little RadioPlayer that works online . Now this is the JavaScript Code that i have
function changeLink(link)
{
/* this changes the link and plays the radio*/
var radio= document.getElementById("radio");
radio.src = link;
radio.play();
}
function jsonLoad()
{
var xmlhttp = new XMLHttpRequest();
var url = "playList.txt";
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
var myArr = JSON.parse(xmlhttp.responseText);
readJSON(myArr);
}
}
xmlhttp.open("GET", url, true);
xmlhttp.send();
}
function readJSON(obj)
{
var list = "<ui>";
for (var i = 0; i < obj.length ; i++)
{
list += "<li><a href='javascript:changeLink(" +"\"" + obj[i].radioLink + "\"" +");'>" + obj[i].name + "</a></li>";
}
list += "</ui>";
document.getElementById("radioLoad").innerHTML = list;
}
Also this is the HTML Code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title> My Radio Player</title>
<script src="Script.js"></script>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body onload="jsonLoad()">
<p>This is the link that i will change his property</p>
<audio id="radio" src="#" controls autoplay preload="auto" ></audio>
</audio>
<br>
<p id="radioLoad">
</p>
</body>
Things is that locally the JSON File is perfectly working, and the webpage shows as i expected. When i put it on a server though, it's like the JSON file is not loaded and the other fuction (readJSON(myArr);) is not fired. Seems that there is something wrong with the IF Condition but i don't know excatly why. Can somebody help me?
EDIT: Seems that the code only works locally in Google Chrome. In internet explorer the links are generated but they don't play the radio when i click on them. Also on the iphone simulator that i tested, the audio tag is not working properly. I will try on different webbrowsers also.
EDIT2: it works now. I managed to figure outthe issue. It was nothing wrong with the code, it was with the server i was hosting on. So i changed the web hoster and now it works. You can see it here:
http://radioplay4all.16mb.com/
Thank you anyway :)
Without debugging it myself I can't be sure, but I'm pretty sure that your problem is in your readJSON() function, when you try to get the .length property of an object (JSON.parse() returns a javascript object), since objects don't have a .length property. To find the number of keys an object has, you could use Object.keys(myArr).length. So in your for loop, obj.length is Null, so i can't be less than Null, so it doesn't execute. So if you replace i < obj.length with i < Object.keys(obj).length that should fix the problem.
I run this in Firefox, when clicking on link, Firefox says NS_ERROR_FILE_UNRECOGNIZED_PATH wheread I followed the instruction from here How to open .EXE with Javascript/XPCOM as Windows "Run..."?
<html>
<head>
<script>
function RunExe(path) {
try {
var ua = navigator.userAgent.toLowerCase();
if (ua.indexOf("msie") != -1) {
MyObject = new ActiveXObject("WScript.Shell")
MyObject.Run(path);
} else {
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
var exe = window.Components.classes['#mozilla.org/file/local;1'].createInstance(Components.interfaces.nsILocalFile);
exe.initWithPath(path);
var run = window.Components.classes['#mozilla.org/process/util;1'].createInstance(Components.interfaces.nsIProcess);
run.init(exe);
var parameters = [""];
run.run(false, parameters, parameters.length);
}
} catch (ex) {
alert(ex.toString());
}
}
</script>
</head>
<body>
Open Word
</body>
In javascript literals, a backslash indicates the beginning of an escape sequence. If you actually want to represent a backslash, you can escape it with a double backslash.
ie
'C:\\Windows\\System32\\cmd.exe /c start winword.exe'
http://www.javascriptkit.com/jsref/escapesequence.shtml
EDIT:
From the comments on the correct answer from the post you linked, it looks like the way he got it working was:
only pass the path to runexe:
javascript:RunExe('C:\Windows\System32\cmd.exe')
set the params equal to the command args:
var parameters = ["/c start winword.exe"];
So this would work theoretically:
<html>
<head>
<script>
function RunExe(path) {
try {
var ua = navigator.userAgent.toLowerCase();
if (ua.indexOf("msie") != -1) {
MyObject = new ActiveXObject("WScript.Shell")
MyObject.Run(path);
} else {
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
var exe = window.Components.classes['#mozilla.org/file/local;1'].createInstance(Components.interfaces.nsILocalFile);
exe.initWithPath(path);
var run = window.Components.classes['#mozilla.org/process/util;1'].createInstance(Components.interfaces.nsIProcess);
run.init(exe);
var parameters = ["/c start winword.exe"];
run.run(false, parameters, parameters.length);
}
} catch (ex) {
alert(ex.toString());
}
}
</script>
</head>
<body>
Open Word
</body>
Although clearly it would be better to pass in the params as an argument than hardcode them as I've done here (or pass them in as part of the path and parse them out)