大约有 30,000 项符合查询结果（耗时：0.0164秒） [XML]
How can I get selector from jQuery object
...r += "." + $.trim(classNames).replace(/\s/gi, ".");
}
alert(selector);
});
});
</script>
</head>
<body>
<h1><span>I love</span> jQuery</h1>
<div>
<p>It's the <strong>BEST THING</strong> ever</p&...
jQuery get value of selected radio button
...:checked.
$(function(){
$("#submit").click(function() {
alert($("input[name=q12_3]:checked").val());
});
});
Note that the above code is not the same as using
.is(":checked").
jQuery's is()
function returns a boolean (true or false) and not an
element.
...
Test for existence of nested JavaScript object key
...r Steele:
var level3 = (((test || {}).level1 || {}).level2 || {}).level3;
alert( level3 );
In fact that whole article is a discussion of how you can do this in javascript. He settles on using the above syntax (which isn't that hard to read once you get used to it) as an idiom.
...
Execute JavaScript code stored as a string
...
You can execute it using a function. Example:
var theInstructions = "alert('Hello World'); var x = 100";
var F=new Function (theInstructions);
return(F());
share
|
improve this answer
...
What does “var FOO = FOO || {}” (assign a variable or an empty object to that variable) mean in Java
...-worker "Bart" in "bart.js"
var FOO = {};
FOO.skateboard = function() {
alert('I like skateboarding!');
};
// Definition of co-worker "Homer" in "homer.js"
var FOO = {};
FOO.donut = function() {
alert('I like donuts!');
};
In this case the skateboard function will be gone if you load the Ja...
Download a file by jQuery.Ajax
...appendChild(a);
a.click();
window.URL.revokeObjectURL(url);
alert('your file has downloaded!'); // or you know, something with better UX...
})
.catch(() => alert('oh no!'));
2012 Original jQuery/iframe/Cookie based approach
Bluish is completely right about this, you c...
Set timeout for ajax (jQuery)
...ething
}).catch(function(e) {
if(e.statusText == 'timeout')
{
alert('Native Promise: Failed from timeout');
//do something. Try again perhaps?
}
});
jQuery 1.8+
$.ajax({
url: '/getData',
timeout:3000 //3 second timeout
}).done(function(){
//do something
}).fail(fun...
Asynchronous Process inside a javascript for loop [duplicate]
...j = 10;
for (i = 0; i < j; i++) {
await asycronouseProcess();
alert(i);
}
Remember, this works only if asycronouseProcess is returning a Promise
If asycronouseProcess is not in your control then you can make it return a Promise by yourself like this
function asyncProcess() {
ret...
Detecting arrow key presses in JavaScript
...down = function(e) {
switch (e.keyCode) {
case 37:
alert('left');
break;
case 38:
alert('up');
break;
case 39:
alert('right');
break;
case 40:
alert('down');
break;
...
How do I check if a number evaluates to infinity?
...ch means that it can be redefined: For example, var x = 42; Infinity = 42; alert(x === Infinity); displays "true". (Admittedly that's an obscure case, and anyone who decides to redefine Infinity, NaN etc should expect odd things to happen.)
– LukeH
Jan 18 '11 a...