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js定时器setInterval()与setTimeout()区别 - 建站技术 - 清泛IT论坛,有思想、有深度

... function showTime() {     var today = new Date();     alert("The time is: " + today.toString());     setTimeout("showTime()", 1000); }复制代码 还真有点混淆,哈哈我一般常用setTimeout,递归调用
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How do I check how many options there are in a dropdown menu?

... alert($('#select_id option').length); share | improve this answer | follow | ...
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How to get label of select option with jQuery?

... <SELECT id="sel" onmouseover="alert(this.options[1].text);" <option value=1>my love</option> <option value=2>for u</option> </SELECT> share ...
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Get everything after the dash in a string in javascript

... getSecondPart(str) { return str.split('-')[1]; } // use the function: alert(getSecondPart("sometext-20202")); share | improve this answer | follow | ...
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Check if all checkboxes are selected

...checkbox'].abc"); if(a.length == a.filter(":checked").length){ alert('all checked'); } }); All this will do is verify that the total number of .abc checkboxes matches the total number of .abc:checked. Code example on jsfiddle. ...
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How to check if two arrays are equal with JavaScript? [duplicate]

... provided example: var a=[1,2,3]; var b=[3,2,1]; var c=new Array(1,2,3); alert(_.isEqual(a, b) + "|" + _.isEqual(b, c)); By the way: Underscore has lots of other methods that jQuery is missing as well, so it's a great complement to jQuery. EDIT: As has been pointed out in the comments, the abov...
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“Single-page” JS websites and SEO

...ion(e){ e.preventDefault(); var name = this.model.get("name"); alert("Hello " + name); }, render: function(){ // do some rendering here, for when this is just running JavaScript } }); $(function(){ var model = new MyModel(); var view = new FooView({ model: model, ...
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get keys of json-object in JavaScript [duplicate]

...onData[obj]){ if(jsonData[obj].hasOwnProperty(prop)){ alert(prop + ':' + jsonData[obj][prop]); } } } } share | improve this answer | ...
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Is it possible to clone html element objects in JavaScript / JQuery?

...div>​ Here is the javascript: $("#foo2").click(function() { //alert("clicked"); var value=$(this).html(); $("#foo1").html(value); });​ Here is the jsfiddle: http://jsfiddle.net/fritzdenim/DhCjf/ shar...
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How to iterate object in JavaScript? [duplicate]

... (i = 0; i < dictionary.data.length; i++) { d = dictionary.data[i]; alert(d.id + ' ' + d.name); } You can also iterate arrays using for..in loops; however, properties added to Array.prototype may show through, and you may not necessarily get array elements in their correct order, or even in...