如何从js函数参数值获取动态的JQuery Selector？

Question

I have this javascript function and i qould to create a jquery selector, which was build from js function parameter value:

function myJSFunction(elementId){
    var showSomeData= {
        'value_1': 'abc',
        'value_2': 'xyz'
    };

    var selector = "[name=" + elementId + "] option";
    jQuery("'" + selector + "'").each(function() {
         $(this).attr('title', showSomeData[$(this).val()]);
    });
}; 

But this kind of code doesn´t work. If i set the concrete value, which i can see in the html dom by using firebug, this code works fine. What was my mistake?

Answer 1

而不是使用$("'" + selector + "'")而是使用$(selector)来解决您的问题。

Answer 2

As stated in comments, you don't need "'" again to find the elements, use directly : jQuery(selector) :

var selector = "[name=" + elementId + "] option";
jQuery(selector).each(function() {
    $(this).attr('title', showSomeData[$(this).val()]);
});

Answer 3

remove Quotes

 var selector = "[name=" + elementId + "] option";
    $(selector).each(function(i,val) {


    });

Demo