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Editing in the Chrome debugger
How do I "dynamically" edit JavaScript code in the Chrome debugger? It's not for me, so I don't have access to the source file. I want to edit code and see what effects they have on the page, in this case stopping an animation from queuing up a bunch of times.
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How do you add CSS with Javascript?
How do you add CSS rules (eg strong { color: red } ) by use of Javascript?
14 Answers
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Is it safe to assume strict comparison in a JavaScript switch statement?
...110 answers your question. (This guy knows a lot about the nitty gritty of JavaScript)
Switches in Javascript use strict type checking (===). So you never
have to worry about coercion, which prevents a few wtfjs :). If on the
other hand you were counting on coercion, tough luck because you c...
How to escape special characters in building a JSON string?
...ur JSON is not valid JSON and any JSON parser will choke on it. (Certainly JavaScript's JSON.parse and Python's json.loads do.)
– Mark Amery
Jan 31 '15 at 16:26
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How can I use a C++ library from node.js?
...fi is a Node.js addon for loading and calling dynamic libraries using pure JavaScript. It can be used to create bindings to native libraries without writing any C++ code.
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Why use Object.prototype.hasOwnProperty.call(myObj, prop) instead of myObj.hasOwnProperty(prop)?
If I understand correctly, each and every object in Javascript inherits from the Object prototype, which means that each and every object in Javascript has access to the hasOwnProperty function through its prototype chain.
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How to create json by JavaScript for loop?
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If you want a single JavaScript object such as the following:
{ uniqueIDofSelect: "uniqueID", optionValue: "2" }
(where option 2, "Absent", is the current selection)
then the following code should produce it:
var jsObj = null;
var status ...
How does Access-Control-Allow-Origin header work?
...XMLHttpRequest's error event and deny the response data to the requesting JavaScript code.
Non-simple requests
What happens on the network level can be slightly more complex than explained above. If the request is a "non-simple" request, the browser first sends a data-less "preflight" OPTIONS req...
How to create JSON string in JavaScript?
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Javascript doesn't handle Strings over multiple lines.
You will need to concatenate those:
var obj = '{'
+'"name" : "Raj",'
+'"age" : 32,'
+'"married" : false'
+'}';
You can also use template ...
What is the best way to determine the number of days in a month with JavaScript?
...he '+ 1' gives 28 days when the year is 2014 and the month is 1 (which, in JavaScript Date-object, means February). Probably want to go with that for least astonishment. But what a great idea from FlySwat!
– Harry Pehkonen
Feb 12 '14 at 14:43
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