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SVG图像加载扩展
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How do you check that a number is NaN in JavaScript?
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Use this code:
isNaN('geoff');
See isNaN() docs on MDN.
alert ( isNaN('abcd')); // alerts true
alert ( isNaN('2.0')); // alerts false
alert ( isNaN(2.0)); // alerts false
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Keyboard shortcuts with jQuery
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<script type="text/javascript">
$(document).ready(function(){
$("#test").keypress(function(e){
if (e.which == 103)
{
alert('g');
};
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How can I use a batch file to write to a text file?
I need to make a script that can write one line of text to a text file in the same directory as the batch file.
7 Answers
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Is it possible to override JavaScript's toString() function to provide meaningful output for debuggi
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While it is true the alert function will display the return value of the function overriding the prototype toString property, Object.prototype.toString.call(f) will still display [object Object].
– Frederik Krautwald
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How do you create a hidden div that doesn't create a line break or horizontal space?
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Show / hide by mouse click:
<script language="javascript">
function toggle() {
var ele = document.getElementById("toggleText");
var text = document.getElementById("displayText");
if (ele.style.display == "block") {
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Avoid browser popup blockers
I'm developing an OAuth authentication flow purely in JavaScript and I want to show the user the "grant access" window in a popup, but it gets blocked.
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Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]
I've seen Bash scripts test for a non-zero length string in two different ways. Most scripts use the -n option:
6 Answers...
Access Control Request Headers, is added to header in AJAX request with jQuery
...domain requests can cause some difficulties. you can always use some proxy script to send your cross-domain requests
– milkovsky
Nov 25 '12 at 13:14
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How to detect escape key press with pure JS or jQuery?
...ect escape key press in IE, Firefox and Chrome?
Below code works in IE and alerts 27 , but in Firefox it alerts 0
8 Answe...