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How can I determine if a JavaScript variable is defined in a page? [duplicate]
How can i check in JavaScript if a variable is defined in a page? Suppose I want to check if a variable named "x" is defined in a page, if I do if(x != null) , it gives me an error.
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How to terminate the script in JavaScript?
How can I exit the JavaScript script much like PHP's exit or die ? I know it's not the best programming practice but I need to.
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How to get the element clicked (for the whole document)?
... the body tag
<body onclick="theFunction(event)">
then use in javascript the following function to get the ID
<script>
function theFunction(e)
{ alert(e.target.id);}
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impro...
How do I resolve a HTTP 414 “Request URI too long” error?
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Here is a working example:
ajaxPOST.html:
<html>
<head>
<script type="text/javascript">
function ajaxPOSTTest() {
try {
// Opera 8.0+, Firefox, Safari
ajaxPOSTTestRequest = new XMLHttpRequest();
} catch (e) {
// Internet Ex...
Can I use twitter bootstrap without jquery?
...u use just the CSS part of it, you won't need jQuery.
If you use the Javascript plugins you need jQuery, since they are jQuery plugins.
v3: http://getbootstrap.com/javascript/
v4: https://getbootstrap.com/docs/4.0/getting-started/javascript/
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jQuery if checkbox is checked
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In CoffeeScript: if $('#my_checkbox').is ':checked'
– Dennis
Feb 21 '14 at 16:53
12
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Pass a PHP array to a JavaScript function [duplicate]
I am trying to get a PHP array variable into a JavaScript variable.
4 Answers
4
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Google Tag Manager 入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...把如下的脚本放到网站全局的页脚，如：footer.inc：
<script type=”text/javascript”>
var _gaq = _gaq || [];
_gaq.push(["_setAccount", "UA-XXXXXX-1"]);
_gaq.push(["_trackPageview"]);
(function() {
var ga = document.createElement(“script”); ga.type = “text/javasc...
JavaScript: Overriding alert()
Has anyone got any experience with overriding the alert() function in JavaScript?
12 Answers
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Client on node: Uncaught ReferenceError: require is not defined
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This is because require() does not exist in the browser/client-side JavaScript.
Now you're going to have to make some choices about your client-side JavaScript script management.
You have three options:
Use <script> tag.
Use a CommonJS implementation. Synchronous dependencies like Node....