Reading environment variable in javascript - javascript

I am trying to achieve something like this.
I am getting a json response after hitting a particular api command (a curl command let's say). I need to convert this result to an html. For this I am thinking of storing the result in an environment variable.
My intentions is to read this variable and so read the json data.
How can I read a environment variable in js?
I am using below program to map the json to html table.
<!DOCTYPE html>
<html>
<head>
<title>Convert JSON Data to HTML Table</title>
<style>
th, td, p, input {
font:14px Verdana;
}
table, th, td
{
border: solid 1px #DDD;
border-collapse: collapse;
padding: 2px 3px;
text-align: center;
}
th {
font-weight:bold;
}
</style>
</head>
<body>
<input type="button" onclick="CreateTableFromJSON()" value="Create Table From JSON" />
<p id="showData"></p>
</body>
<script>
function CreateTableFromJSON() {
var myBooks = [
{
"Book ID": "1",
"Book Name": "Computer Architecture",
"Category": "Computers",
"Price": "125.60"
},
{
"Book ID": "2",
"Book Name": "Asp.Net 4 Blue Book",
"Category": "Programming",
"Price": "56.00"
},
{
"Book ID": "3",
"Book Name": "Popular Science",
"Category": "Science",
"Price": "210.40"
}
]
// EXTRACT VALUE FOR HTML HEADER.
// ('Book ID', 'Book Name', 'Category' and 'Price')
var col = [];
for (var i = 0; i < myBooks.length; i++) {
for (var key in myBooks[i]) {
if (col.indexOf(key) === -1) {
col.push(key);
}
}
}
// CREATE DYNAMIC TABLE.
var table = document.createElement("table");
// CREATE HTML TABLE HEADER ROW USING THE EXTRACTED HEADERS ABOVE.
var tr = table.insertRow(-1); // TABLE ROW.
for (var i = 0; i < col.length; i++) {
var th = document.createElement("th"); // TABLE HEADER.
th.innerHTML = col[i];
tr.appendChild(th);
}
// ADD JSON DATA TO THE TABLE AS ROWS.
for (var i = 0; i < myBooks.length; i++) {
tr = table.insertRow(-1);
for (var j = 0; j < col.length; j++) {
var tabCell = tr.insertCell(-1);
tabCell.innerHTML = myBooks[i][col[j]];
}
}
// FINALLY ADD THE NEWLY CREATED TABLE WITH JSON DATA TO A CONTAINER.
var divContainer = document.getElementById("showData");
divContainer.innerHTML = "";
divContainer.appendChild(table);
}
</script>
</html>

As Quentin says: you can't, but look into Local Storage instead.

JavaScript, running client-side in an HTML document, has no access to environment variables at all. So you can't.

Related

How to add clickable text in dynamically created table in JS

I have a dynamically generated table based on JSON response. The table has 3 columns - 1 for S. No., 2 for Name, and 3 is supposed to have two text links like Edit | Delete.
Edit and Delete are supposed to be clickable individually and upon clicking them I want to retrieve the respective JSON object to be able to process it further.
Example -
JSON response:
[
{
"id": 2,
"owner": 1,
"name": "General"
},
{
"id": 3,
"owner": 1,
"name": "Specific"
},
{
"id": 10,
"owner": 1,
"name": "One more"
},
{
"id": 11,
"owner": 1,
"name": "Test Category"
}
]
JS to generate table from the above JSON data:
function populateTable(data) {
const resLen = data.length;
var col = [];
col.push("S. No.");
for (var i=0; i<data.length; i++) {
for (var key in data[i]) {
if (col.indexOf(key) === -1 && key == "name") {
col.push(key);
}
}
}
col.push(" ");
var table = document.createElement("table");
var tr = table.insertRow(-1);
for (var i=0; i<col.length; i++) {
var th = document.createElement("th");
if (col[i] == "name") {
th.innerHTML = "Name";
tr.appendChild(th);
} else {
th.innerHTML = col[i];
tr.appendChild(th);
}
}
for (var i=data.length-1; i>=0; i--) {
tr = table.insertRow(-1);
for (var j=0; j<col.length; j++) {
var tabCell = tr.insertCell(-1);
if (j == 0) {
tabCell.innerHTML = ((data.length-1) - i)+1;
} else if (j == 2) {
tabCell.innerHTML = "Delete"
} else {
tabCell.innerHTML = data[i][col[j]];
}
}
}
var divContainer = document.getElementById("categoriesTable");
divContainer.innerHTML = "";
divContainer.appendChild(table);
}
Visual of the table:
I want to add clickable text in the third column (where currenlty Delete is) such that when I click on the text, I can retrieve its related JSON object and extract the id. I would like to do this in plain JS and HTML.
at first i suggest you using helper libraries like jquery(https://jquery.com) to have a better life but if you prefer pure javascript to attach event to dynamic created elements, your answer is event delegation which is answered in this post:
Attach event to dynamic elements in javascript
With jquery:
inside td tag, use button or link tag as delete button
add a css class(class="btn_delete") with a referal attribute to keep row id(data-rowid="25")
add jquery code
$(document).on('click','.btn_delete',function(){var rowid=$(this).data('rowid');//do something else ... });
You can use a html a tag:
text

How to insert link in a button in table from json file

I am making a table in which I am inserting data using a json file.
Now my json file has some links. I want those links not to be directly inserted in the table but the links should be inserted in the button in one of the columns of table so that when I click that button I am redirected to the link.
Here is my html code:
<body>
<input type="button" onclick="CreateTableFromJSON()" value="Create Table
From JSON" />
<p id="showData"></p>
<script type="text/javascript" src="csvjson.json"></script>
<script>
function CreateTableFromJSON() {
// EXTRACT VALUE FOR HTML HEADER.
// ('Book ID', 'Book Name', 'Category' and 'Price')
var col = [];
for (var i = 0; i < links.length; i++) {
for (var key in links[i]) {
if (col.indexOf(key) === -1) {
col.push(key);
}
}
}
// CREATE DYNAMIC TABLE.
var table = document.createElement("table");
// CREATE HTML TABLE HEADER ROW USING THE EXTRACTED HEADERS ABOVE.
var tr = table.insertRow(-1); // TABLE ROW.
for (var i = 0; i < col.length; i++) {
var th = document.createElement("th"); // TABLE HEADER.
th.innerHTML = col[i];
tr.appendChild(th);
}
// ADD JSON DATA TO THE TABLE AS ROWS.
for (var i = 0; i < links.length; i++) {
tr = table.insertRow(-1);
for (var j = 0; j < col.length; j++) {
var tabCell = tr.insertCell(-1);
tabCell.innerHTML = links[i][col[j]];
}
}
// FINALLY ADD THE NEWLY CREATED TABLE WITH JSON DATA TO A
CONTAINER.
var divContainer = document.getElementById("showData");
divContainer.innerHTML = "";
divContainer.appendChild(table);
}
</script>
Here is the json file:
var links=[
{
"File": "1. Google",
"Direct Link": "https://www.google.com",
}]
You can check the property name to wrap them in button like anchor tag:
var links=[{
"File": "1. Google",
"Direct Link": "https://www.google.com",
}];
function CreateTableFromJSON() {
// EXTRACT VALUE FOR HTML HEADER.
// ('Book ID', 'Book Name', 'Category' and 'Price')
var col = [];
for (var i = 0; i < links.length; i++) {
for (var key in links[i]) {
if (col.indexOf(key) === -1) {
col.push(key);
}
}
}
// CREATE DYNAMIC TABLE.
var table = document.createElement("table");
// CREATE HTML TABLE HEADER ROW USING THE EXTRACTED HEADERS ABOVE.
var tr = table.insertRow(-1); // TABLE ROW.
for (var i = 0; i < col.length; i++) {
var th = document.createElement("th"); // TABLE HEADER.
th.innerHTML = col[i];
tr.appendChild(th);
}
// ADD JSON DATA TO THE TABLE AS ROWS.
for (var i = 0; i < links.length; i++) {
tr = table.insertRow(-1);
for (var j = 0; j < col.length; j++) {
var tabCell = tr.insertCell(-1);
if(col[j] == 'Direct Link')
tabCell.innerHTML = `<a class=button href=${links[i][col[j]]}>${links[i][col[j]]}</a>`;
else
tabCell.innerHTML = links[i][col[j]];
}
}
var divContainer = document.getElementById("showData");
divContainer.innerHTML = "";
divContainer.appendChild(table);
}
.button {
font: bold 11px Arial;
text-decoration: none;
background-color: #EEEEEE;
color: #333333;
padding: 2px 6px 2px 6px;
border-top: 1px solid #CCCCCC;
border-right: 1px solid #333333;
border-bottom: 1px solid #333333;
border-left: 1px solid #CCCCCC;
cursor: pointer;
}
<input type="button" onclick="CreateTableFromJSON()" value="Create Table
From JSON" />
<p id="showData"></p>
Add anchor element. Change tabCell.innerHTML = links[i][col[j]]; with tabCell.innerHTML = "" + links[0]["File"] + "";

Failed to create table in html from api data using ajax request

I need help on how to create table from data fetch from API server in html.
A possible duplicate of this question
I need to request json data from a url, then use that data to dynamically create table in html.
Below are my test.html
<!DOCTYPE html>
<html>
<head>
...
...
</head>
<body>
...
...
...
<div class="row">
<div class="col-xs-12">
<div class="box">
<div class="box-header">
<h3 class="box-title">Activity</h3>
</div>
<div id = "showData" class="box-body"></div>
</div>
</div>
</div>
<script src="../static/plugins/jQuery/jquery-2.2.3.min.js"></script>
<script src="../static/plugins/jQueryUI/jquery-ui.min.js"></script>
<script>
$.ajax({
url: "http://127.0.0.1:4220/pipeline/v1/bpwi/",
success: function (data) {
var col = [];
for (var i = 0; i < data.length; i++) {
for (var key in data[i]) {
if (col.indexOf(key) === -1) {
col.push(key);
}
}
}
var table = document.createElement("table");
var tr = table.insertRow(-1);
for (var i = 0; i < col.length; i++) {
var th = document.createElement("th");
th.innerHTML = col[i];
tr.appendChild(th);
}
for (var i = 0; i < data.length; i++) {
tr = table.insertRow(-1);
for (var j = 0; j < col.length; j++) {
var tabCell = tr.insertCell(-1);
tabCell.innerHTML = myBooks[i][col[j]];
}
}
var divContainer = document.getElementById("showData");
divContainer.innerHTML = "";
divContainer.appendChild(table);
}
})
</script>
</body>
</html>
Expected ajax response is something like this
[
{
"ID": "1",
"Name": "Computer",
"Category": "Computers",
"Price": "125.60"
},
{
"ID": "2",
"Name": "Blue",
"Category": "Sport",
"Price": "56.00"
},
{
"ID": "3",
"Book Name": "Science",
"Category": "Science",
"Price": "210.40"
}
]
I have refreshed my browser many times but the result is not good.
Here is the result
-----------------------------------------------------------------
Activity
-----------------------------------------------------------------
0
[
{
"
I
D
"
:
"
1
"
...
...
I am really new to javascript and some of good example I found is the possible question I posted above and here but both did not show a clear example on how to implement http request for getting the data from external source.
I really hope someone can pointed out for me what I did wrong in this code.
Thank you for your help and suggestion.

How to make a search query for a JSON file in Javascript

G'day,
So i've got this code to display a JSON file in a table and it works. What I want to know is how can I add a search bar for the table (I want to search by postcode)
function CreateTableFromJSON() {
var Data = [
{
"Service name": "3Bridges Community Incorporated",
"Physical Address Line 1": "1/72 Carwar Avenue",
"Physical Address Suburb": "CARSS PARK",
"Physical Address State": "NSW",
"Physical Address Post Code": 2221,
"Care Type": "Home Care Places",
"Residential Places": null,
"Home Care Low Places": 35,
"Home Care High Places": 10,
"Transition Care Places": null
}
]
// EXTRACT VALUE FOR HTML HEADER.
// ('Book ID', 'Book Name', 'Category' and 'Price')
var col = [];
for (var i = 0; i < Data.length; i++) {
for (var key in Data[i]) {
if (col.indexOf(key) === -1) {
col.push(key);
}
}
}
// CREATE DYNAMIC TABLE.
var table = document.createElement("table");
table.className += "alt";
// CREATE HTML TABLE HEADER ROW USING THE EXTRACTED HEADERS ABOVE.
var tr = table.insertRow(-1); // TABLE ROW.
for (var i = 0; i < col.length; i++) {
var th = document.createElement("th"); // TABLE HEADER.
th.innerHTML = col[i];
tr.appendChild(th);
}
// ADD JSON DATA TO THE TABLE AS ROWS.
for (var i = 0; i < Data.length; i++) {
tr = table.insertRow(-1);
for (var j = 0; j < col.length; j++) {
var tabCell = tr.insertCell(-1);
tabCell.innerHTML = Data[i][col[j]];
}
}
// FINALLY ADD THE NEWLY CREATED TABLE WITH JSON DATA TO A CONTAINER.
var divContainer = document.getElementById("showData");
divContainer.innerHTML = "";
divContainer.appendChild(table);
}
Some help would be greatly appreciated!
And here is my HTML:
<div class="table-wrapper">
<div id="showData"></div>
</div>
I'd say do a onchange event to a text input, and every time user defocus the text box, it will call your createTable function with a zip in parameter.
function search(zip)
{
CreateTableFromJSON(zip);
}
function CreateTableFromJSON(zip) {
var Data = [
{
"Service name": "3Bridges Community Incorporated",
"Physical Address Line 1": "1/72 Carwar Avenue",
"Physical Address Suburb": "CARSS PARK",
"Physical Address State": "NSW",
"Physical Address Post Code": 2221,
"Care Type": "Home Care Places",
"Residential Places": null,
"Home Care Low Places": 35,
"Home Care High Places": 10,
"Transition Care Places": null
}
]
//apply filter
Data=Data.filter(d=>d["Physical Address Post Code"]==zip || !zip)
// EXTRACT VALUE FOR HTML HEADER.
// ('Book ID', 'Book Name', 'Category' and 'Price')
var col = [];
for (var i = 0; i < Data.length; i++) {
for (var key in Data[i]) {
if (col.indexOf(key) === -1) {
col.push(key);
}
}
}
// CREATE DYNAMIC TABLE.
var table = document.createElement("table");
table.className += "alt";
// CREATE HTML TABLE HEADER ROW USING THE EXTRACTED HEADERS ABOVE.
var tr = table.insertRow(-1); // TABLE ROW.
for (var i = 0; i < col.length; i++) {
var th = document.createElement("th"); // TABLE HEADER.
th.innerHTML = col[i];
tr.appendChild(th);
}
// ADD JSON DATA TO THE TABLE AS ROWS.
for (var i = 0; i < Data.length; i++) {
tr = table.insertRow(-1);
for (var j = 0; j < col.length; j++) {
var tabCell = tr.insertCell(-1);
tabCell.innerHTML = Data[i][col[j]];
}
}
// FINALLY ADD THE NEWLY CREATED TABLE WITH JSON DATA TO A CONTAINER.
var divContainer = document.getElementById("showData");
divContainer.innerHTML = "";
divContainer.appendChild(table);
}
HTML .
<div class="table-wrapper">
<input type="text" name="searchText" value="" onchange="search(this.value)">
<div id="showData"></div>
</div>

Trying to convert the JSON file to an HTML Table using jQuery

I am trying to convert the Array to an HTML Table using jQuery. However, the browser shows nothing from the JSON file. Please see my codes below.
JSON file
[
{
"Book ID": "1",
"Book Name": "Computer Architecture",
"Category": "Computers",
"Price": "125.60"
},
{
"Book ID": "2",
"Book Name": "Asp.Net 4 Blue Book",
"Category": "Programming",
"Price": "56.00"
},
{
"Book ID": "3",
"Book Name": "Popular Science",
"Category": "Science",
"Price": "210.40"
}
]
HTML and JS
<script>
$(document).ready(function () {
$.getJSON("result.json", function (data) {
var arrItems = []; // THE ARRAY TO STORE JSON ITEMS.
$.each(data, function (index, value) {
arrItems.push(value); // PUSH THE VALUES INSIDE THE ARRAY.
});
// EXTRACT VALUE FOR TABLE HEADER.
var col = [];
for (var i = 0; i < arrItems.length; i++) {
for (var key in arrItems[i]) {
if (col.indexOf(key) === -1) {
col.push(key);
}
}
}
// CREATE DYNAMIC TABLE.
var table = document.createElement("table");
// CREATE HTML TABLE HEADER ROW USING THE EXTRACTED HEADERS ABOVE.
var tr = table.insertRow(-1); // TABLE ROW.
for (var i = 0; i < col.length; i++) {
var th = document.createElement("th"); // TABLE HEADER.
th.innerHTML = col[i];
tr.appendChild(th);
}
// ADD JSON DATA TO THE TABLE AS ROWS.
for (var i = 0; i < arrItems.length; i++) {
tr = table.insertRow(-1);
for (var j = 0; j < col.length; j++) {
var tabCell = tr.insertCell(-1);
tabCell.innerHTML = arrItems[i][col[j]];
}
}
// FINALLY ADD THE NEWLY CREATED TABLE WITH JSON DATA TO A CONTAINER.
var divContainer = document.getElementById("showData");
divContainer.innerHTML = "";
divContainer.appendChild(table);
});
});
Hi gusy, I am trying to convert the Array to an HTML Table using jQuery. However, the browser shows nothing from the JSON file. Please see my codes below.

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