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How can I get complex URI query string parameters in native JavaScript like in PHP?

My question is about full power solution for parsing ANY complex URI parameters using just normal browser's Javascript. Like it do PHP, for simple code compatibility between JS and PHP sources.
But the first, let us see some particular known decisions:
1.
There is popular question and answers on StackOverflow, see How can I get query string values in JavaScript?
You can find there quite simple solutions for common SIMPLE cases. For example, like handling this scalar parameters like this one:
https://example.com/?name=Jonathan&age=18
It has no answers for handling complex query params. (As far as I could see for answers with source codes and author comments)
2.
Also you may use an URL object in modern browsers, see https://developer.mozilla.org/en-US/docs/Web/API/URL, or exactly https://developer.mozilla.org/en-US/docs/Web/API/URL/searchParams
It is enought powerful and you don't need to write or load any code for parsing URI parameters - just use
var params = (new URL(document.location)).searchParams;
var name = params.get("name"); // is the string "Jonathan"
var age = parseInt(params.get("age")); // is the number 18
This approach has such disadvantage that URL is available only in most of modern browsers, - other browsers or outdated versions of browsers will fail.
So, what I need. I need parsing any complex URI params, like
https://example.com/?a=edit&u[name]=Jonathan&u[age]=18&area[]=1&area[]=20&u[own][]=car&u[own][]=bike&u[funname]=O%27Neel%20mc%20Fly&empty=&nulparam&the%20message=Hello%20World
to
{
'a': 'edit',
'u': {
'name': 'Jonathan',
'age': '18',
'own': ['car', 'bike'],
'funname': 'O\'Neel mc Fly'
},
'area': [1, 20],
'empty': '',
'nulparam': null,
'the message': 'Hello World'
}
Preferrable answer is just plain readable javascript source. Simple and small wide-used library can be accepted too, but this question is not about them.
`
PS:
To start I just publish my own current solution for parsing URI params and vice versa for making URI from params. Any comments for it are welcome.
Hope this helps to save time for lot of coders later.

My solution
Usage:
var params = getQueryParams(location.search);
var params = getQueryParams();
var params = {...};
var path = '...';
var url = path;
var urlSearch = getQueryString(params);
if (urlSearch) {
url += '?' + urlSearch;
}
history.replaceState({"autoUrl": url}, "autoreplace", url);
Code:
function getQueryParams(qs) {
if (typeof qs === 'undefined') {
qs = location.search;
}
qs = qs.replace(/\+/g, ' ');
var params = {},
tokens,
re = /[?&]?([^=]+)=([^&]*)/g;
while (tokens = re.exec(qs)) {
var name = decodeURIComponent(tokens[1]);
var value = decodeURIComponent(tokens[2]);
if (value.length == 0) {
continue;
}
if (name.substr(-2) == '[]') {
name = name.substr(0, name.length - 2);
if (typeof params[name] === 'undefined') {
params[name] = [];
}
if (value === '') {
continue;
}
params[name].push(value);
continue;
}
if (name.substr(-1) == ']') {
var nameParts = name.split('[');
name = nameParts[0];
for (var i = 1; i < nameParts.length; i++) {
nameParts[i] = nameParts[i].substr(0, nameParts[i].length - 1);
}
var ptr = params;
for (var i = 0; i < nameParts.length - 1; i++) {
name = nameParts[i];
if (typeof ptr[name] === 'undefined') {
ptr[name] = {};
}
ptr = ptr[name];
}
name = nameParts[nameParts.length - 1];
ptr[name] = value;
continue;
}
params[name] = value;
}
return params;
}
function getQueryString(params) {
var paramsStringParts = [];
for (var name in params) {
if (params[name] instanceof Array) {
paramsStringParts.push( name + '[]=' + params[name].join('&' + name + '[]=') );
} else if (typeof params[name] === 'object') {
var makeFlattern = function(obj){
var result = [];
if (obj instanceof Array) {
for (var i = 0; i < obj.length; i++) {
result.push('[]=' + obj[i]);
}
return result;
}
for (var i in obj) {
if (typeof obj[i] === 'object') {
var subResult = makeFlattern(obj[i]);
for (var j = 0; j < subResult.length; j++) {
result.push('[' + i + ']' + subResult[j]);
}
continue;
}
result.push('[' + i + ']=' + obj[i]);
}
return result;
};
paramsStringParts.push( name + makeFlattern(params[name]).join('&' + name) );
} else {
paramsStringParts.push( name + '=' + params[name] );
}
}
return paramsStringParts.join('&');
}

A bit late, but just struggled over the same problem, solution was very simple:
use encodeURIComponent(...) for the stringified complex objects, the result can then be used as normal queryString-Part.
In the result-side the query-string-parameters have to be un-stringified.
Example:
var complex_param_obj = {
value1: 'Wert1',
value2:4711
};
console.log(restored_param_obj);
var complex_param_str = encodeURIComponent(JSON.stringify(complex_param_obj));
console.log(complex_param_str);
var complex_param_url = 'http://test_page.html?complex_param=' + complex_param_str;
//on the result-side you would use something to extract the complex_param-attribute from the URL
//in this test-case:
var restored_param_obj = decodeURIComponent(complex_param_str);
console.log(restored_param_obj);

Javascript through HTTP GET Request with parameters

I see in MathJax they include the script like this.
<script type="text/javascript" src="path-to-MathJax/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
Is there a way to get the config parameter in javascript?

The only way to get that URL is to search the current document and find that particular <script> tag and then get the .src property from the script tag and then parse it to get the config parameters.
Scripts are loaded into the global browser namespace and don't have any properties or variables that are unique to a particular script. You could use something like this:
function findScript(tagToMatch) {
var scripts = document.getElementsByTagName("script");
for (var i = 0; i < scripts.length; i++) {
if (scripts[i].src.indexOf(tagToMatch) !== -1) {
// scripts[i].src is the full URL
return scripts[i].src;
}
}
}
And, then you could use that generic function to find your particular tag and parse out the config value like this:
function findConfig() {
var url = findScript("/MathJax.js?"), matches;
if (url) {
matches = url.match(/[&?]config=([^&$]+)/);
if (matches) {
return matches[1];
}
}
return null;
}
var cfg = findConfig();
And, here's a working snippet:
function findScript(tagToMatch) {
var scripts = document.getElementsByTagName("script");
for (var i = 0; i < scripts.length; i++) {
if (scripts[i].src.indexOf(tagToMatch) !== -1) {
// scripts[i].src is the full URL
return scripts[i].src;
}
}
}
function findConfig() {
var url = findScript("/MathJax.js?"), matches;
if (url) {
matches = url.match(/[&?]config=([^&$]+)/);
if (matches) {
return matches[1];
}
}
return null;
}
document.write(findConfig());
<script type="text/javascript" src="path-to-MathJax/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>

You can use regular expressions and plain-old-javascript to extract the config parameter, but if you're using jQuery there are more elegant ways of isolating the element you need.
function extractMathJaxConfig() {
var scripts = document.getElementsByTagName("script")
var regex = /config=([^&]+)/
for (var i = 0; i < scripts.length; ++i) {
var src = scripts[i].src;
if (src.indexOf("MathJax.js") != -1) {
var results = regex.exec(src);
if (results) return results[1];
}
}
}
console.log(extractMathJaxConfig());
JSFiddle: https://jsfiddle.net/vdqvjnbw/

You won't get that parameter via your script that you're requesting in that script tag, here's why:
The binary representation of the JS code will not be loaded into memory until the browser has pulled those bytes into the page. Meaning, that JS is basically just a text file out on the server until its downloaded by the browser and interpreted; the JavaScript has no behavior until then.
However, inside of your page -- if you'd like to strip that query param from the src attribute of your script tag -- you can do something like this:
function getURIComponents(uri) {
var a = document.createElement('a');
a.href = uri;
return {
origin: a.origin,
search: a.search
};
}
function getParams(uri) {
var c = getURIComponents(uri);
var pairs = c.search.split('?')[1].split('&');
var params = {};
for (var i = 0, len = pairs.length; i < len; i++) {
var pair = pairs[i].split('=');
var name = pair[0];
var value = pair[1];
params[name] = value;
}
return params;
}
getParams(document.getElementByTagName('script').src);
This [untested] code should give you an object containing a key config with what value has been set for it.
Hope this helps.

Javascript, var contains

I currently use this script:
wHandle.setNick = function (arg) {
userNickName = arg;
var fnicks = ["porno","ibne","amcık","amcik","piç","salak","orospu","pkk","sik","kürdistan","kurdistan","kÜrdistan","kürt","sikeyim","sıkeyim","götoş","yönetici","YÖNETICI","YONETICI","yonetici","admın","admin","yarah","yarrah","agario","sike","s1ke","anan"];
var nctr = arg.toLowerCase();
if(fnicks.indexOf(nctr) > -1) {
alert("Unknown Nickname!");
} else {
hideOverlays();
sendNickName();
wjQuery("#mini-map-wrapper").show();
userScore = 0
wjQuery(".btn-needs-nick").prop("disabled", false);
}
};
I wanted to make some kind of filter, so that it blocks these nicknames BUT it isn't covering all of my cases. For example it blocks porno but not pornoo
I want it to use if(contains).

You've essentially done your logic backwards. Instead of checking if the nickname is in your block list, you'd be better served checking if an element of your blocklist is in your nickname like so:
var nick = args.toLowerCase();
for (var i; i < fnicks.length; i++) {
if (nick.indexOf(fnicks[i]) != -1) {
//bad name!
}
}

well I would just loop through the array, and search if the argument you pass (nctr in that case) contains the current entry (fnicks[i]).
you can replace the console.log() by your usual alert()
var arg = "pornoo";
var fnicks = ["porno","ibne","amcık","amcik","piç","salak","orospu","pkk","sik","kürdistan","kurdistan","kÜrdistan","kürt","sikeyim","sıkeyim","götoş","yönetici","YÖNETICI","YONETICI","yonetici","admın","admin","yarah","yarrah","agario","sike","s1ke","anan"];
var nctr = arg.toLowerCase();
for(var i=0,c=fnicks.length;i<c;i++) {
if(nctr.indexOf(fnicks[i]) > -1) {
console.log('boom');
}
}

Iframe onload seems to not work in time

after dynamicly creating some iframes, setting src and onload, I expect that the contents would be available for putting it to an array and sort the array. Next would be removing the iframes (interesting content already put in array) and create a table on my HTML-page. When no alert is set before sorting, the array is empty as the onload fires just before finishing the script. When an alert is place before sorting,I found the onload-procedure fired, array was populated and everything works fine?!! But I don't want to put an alert, can anyone explain what I did wrong? It's my first script so please help me to understand.
function LoadFile( ) {
var FName, PName, myID, myFrame;
var myBody = document.getElementById("StartList");
for ( var i = 0; i < FileList.length; i++ ) {
// Read input file into frame
FName = FileList[i].FName;
PName = FName + ".html";
myID = "iframe" + i;
// Create frame.
myFrame = document.createElement("iframe");
myFrame.setAttribute("id", myID);
myFrame.setAttribute("width","0");
myFrame.setAttribute("height","0");
myFrame.setAttribute('src', PName);
//Attach onload-event to frame, triggering ReadTableInfo.
if (myFrame.attachEvent){
myFrame.attachEvent("onload", function(){
ReadTableInfo();
});
} else {
myFrame.onload = function(){
ReadTableInfo();
};
}
myBody.appendChild(myFrame);
}
}
function ReadTableInfo() {
var a = document.getElementsByTagName("iframe")[idx];
var p = FileList[idx].FName;
var b = (a.contentWindow || a.contentDocument);
var td;
if ( b.document) {
b = b.document;
// Get and process table with functions and procedures.
var myTable = b.getElementsByTagName("Table")[5];
var myList = myTable.getElementsByTagName("TR");
var Name = "";
var Desc = "";
for ( var j = 0; j < myList.length; j++) {
Name = myTable.getElementsByTagName("TR") [j].getElementsByTagName("A")[0].innerHTML;
if ( myTable.getElementsByTagName("TR")[j].getElementsByTagName("TD")[1] != null) {
td = myTable.getElementsByTagName("TR")[j].getElementsByTagName("TD")[1];
Desc = td.textContent || td.innerText || "";
}
if ( searchval == "" || ( TestVal.test(Name) && searchkey == 1 ) || ( TestVal.test(Desc) && searchkey == 2 ) ) {
ProcList[ProcList.length++] = new AddProcList(Name.toLowerCase(), p.toLowerCase(), Desc);
}
Name = "";
Desc = "";
}
idx++;
}
}
function UpdateList( opt ) {
searchval = document.getElementById("edtSearchVal").value;
TestVal = new RegExp(".", "i");
if ( searchval !== "" ) {
if ( opt == 2 ) {
TestVal = new RegExp(searchval, "i"); // searchpattern for RegExp descriptions
} else {
TestVal = new RegExp(searchval.replace(" ","_"), "i"); // searchpattern for RegExp.
}
}
switch ( opt ) {
case 1: searchkey = 1;
break;
case 2: searchkey = 2;
break;
default:
searchkey = 3;
}
Init();
// Get package names from index.
SetFileList(); // Determines which external files to examine.
LoadFile(); // Loads the external files into iframes to be used later.
alert("Start generating list, this may take a while."); // Necessary to read frames! Don't know why???
var sortkeys = {FName:"a",PName:"a"}; // Sorting order of ProcList, which will be the listorder.
ProcList.keySort(sortkeys); // Sort ProcList.
TableCreate(); // Make new table with all entries in ProcList
}
Thanks for any comments, just here to learn from others :))

your LoadFile(); is loading content to iframe , and alert() is giving just enough time for iframe content to load completely, hence rest of the code works. If you remove alert then rest of the code is executed immediately before iframe content is loaded.
I would suggest to put onload even inside iframe page as well. Then propagate this event to parent window. To access parent container window you can do window.parent inside iframe.

How to Access local CSS file from within Alfresco Javascript?

So I have been able to figure out in Alfresco, there is a form called skin.css that allows me to change the highlighted color of data table items. However, I only want to be able to change this property during the course of a workflow and not as it applies to all data list elements throughout the entire Share website.
To start, I have a script which kicks off based on a rule and moves any updated/new files into a specified folder and then kicks off a workflow for that file. Within starting the workflow, the package items list is populated with all the documents within the same folder as the document that just got moved/the workflow started on. Below is the script:
function main()
{
var counter=0;
//Administrative Adjudication space/folder MUST exist under companyhome.
var rootSpaceName = companyhome.childByNamePath("mainFolder");
//If the rootspacename is null (not previously created), then exit the program as we have nothing to do.
if(rootSpaceName == null)
{
logger.log("Company Home/mainFolder does not exist, so we have nothing to do.");
return;
}
else
{
logger.log("Company Home/mainFolder exists, so carry on our process.");
//Creates an array of all the children under the rootSpaceName
var childList = rootSpaceName.children;
//Creates a variable which counts the number of children in the childList array
var count = childList.length;
//var seconds = new Date().getTime() / 1000;
//If there are no children in the rootSpaceName folder, exit the program.
if(count == 0)
{
logger.log("Company Home/mainFolder does not have child, nothing to do.");
return;
}
else
{
for(var i = 0; i < count; i++)
{
//Title MUST exist.
var childTitle = childList[i].properties["hearing:childTitle"];
//Author MUST exist.
var childAuthor = childList[i].properties["hearing:childAuthor"];
logger.log("childTitle: " + childTitle);
logger.log("childAuthor: " + childAuthor);
if(childTitle == null || childAuthor == null)
{
logger.log(i + ". Both the childTitle and childAuthor are null...");
continue;
}
var child = childList[i];
if(child.isContainer == false)
{
for(var j = 0; j < count; j++)
{
var newChildName = childList[j].properties.name;
logger.log("New child name: " + newChildName);
var newChild = childList[j];
if((newChild.isContainer == true) && (childTitle == newChildName))
{
logger.log("There is a currently existing folder with the same name as the title of original child");
var newSpaceName = rootSpaceName.childByNamePath(newChildName);
var newChildList = newSpaceName.children;
var newCount = newChildList.length;
for(var k = 0; k < newCount; k++)
{
var newNewChildName = newChildList[k].properties.name;
var newNewchildAuthor = newChildList[k].properties.author;
var newNewChild = newChildList[k];
if((newNewChild.isContainer == true) && (newNewchildAuthor == childAuthor))
{
var currentSpace = newSpaceName.childByNamePath(newNewChildName);
if(child.isDocument == true)
{
//Only want the workflow to run once so we increment count
counter=counter+1;
child.move(currentSpace);
//If Count is 1, then run workflow
if(counter==1)
{
//starts HelloWorldUI workflow
var wfdef=workflow.getDefinitionByName("activiti$helloWorldUI");
if(wfdef)
{
var wfparams=new Array();
wfparams["bpm:workflowDescription"]="";
wfparams["bpm:groupAssignee"]=people.getGroup("GROUP_Managers");
var wfpackage=workflow.createPackage();
var rootSpaceName=currentSpace;
var childList=rootSpaceName.children;
var count=childList.length;
//add all existing documents in the space to the workflow
for(var i = 0; i < count; i++)
{
wfpackage.addNode(childList[i]);
}
var wfpath=wfdef.startWorkflow(wfpackage,wfparams);
var tasks=wfpath.getTasks();
for each(task in tasks)
{
task.endTask(null);
}
}
}
}
}
}
}
else
{
// If title folder is already created, not need to create again.
var newSpaceName = companyhome.childByNamePath("mainFolder/" + childTitle);
if(newSpaceName == null)
{
newSpaceName = rootSpaceName.createFolder(childTitle);
logger.log("mainFolder/" + childTitle + " is created.");
}
// If author folder is already created, not need to create again.
var newNewSpaceName = companyhome.childByNamePath("mainFolder/" + childTitle + "/" + childAuthor);
if(newNewSpaceName == null)
{
newNewSpaceName = newSpaceName.createFolder(childAuthor);
logger.log("mainFolder/" + childTitle + "/" + childAuthor + " is created.");
}
if(child.isDocument == true)
{
counter=counter + 1;
child.move(newNewSpaceName);
if(counter == 1)
{
var wfdef=workflow.getDefinitionByName("activiti$helloWorldUI");
if(wfdef)
{
var wfparams=new Array();
wfparams["bpm:workflowDescription"]="";
wfparams["bpm:groupAssignee"]=people.getGroup("GROUP_Managers");
var wfpackage=workflow.createPackage();
var rootSpaceName=newNewSpaceName;
var childList=rootSpaceName.children;
var count=childList.length;
//add all items from the space to the workflow
for(var i = 0; i <c ount; i++)
{
wfpackage.addNode(childList[i]);
}
var wfpath=wfdef.startWorkflow(wfpackage,wfparams);
var tasks=wfpath.getTasks();
for each(task in tasks)
{
task.endTask(null);
}
}
}
logger.log("Moving file " + child.properties.name);
}
}
}
}
}
}
}
return;
}
main();
I would like to be able to create a function of some sort that can be called to access the skin.css file only during the course of the workflow and basically set .yui-skin-default tr.yui-dt-first{background-color:#FFF} in the CSS file. Does anyone know how I would go about doing that?

If you want to change only in start workflow page,
your css should write in start-workflow.css which is pointed by start-workflow.get.head.ftl. This css will override in other css file like skin.css.
Like this way, you can override any css to affect in only start workflow page not others.
You can try for other workflow related pages.

I've found a bookmarklet that will allow you to inject a CSS file on any page you'd like. Only down side is that you'll have to run it every time you load your page.
http://allben.net/post/2010/01/30/CSS-JavaScript-Injection-Bookmarklets.aspx