在 javascript 中动态更改 function 名称

Question

$('a').live('click',function(e){
    e.preventDefault();
    var id = $(this).attr('id');
    infowindow2.open(map, marker2); // I need instead of 2 to print the value of variable id
});

How can I dynamically change the number 2 to variable ID?

Thanks for any help

Answer 1

Don't use eval , use a hash:

var markers = {
    "key1": function(){},
    "key2": function(){},
    "key3": function(){}
};

$('a').live('click',function(e){
    e.preventDefault();
    var id = this.id; //Use this.id instead of attr
    infowindow2.open(map, markers[id]);
});

Answer 2

Instead of using eval , - better change you data structures:

var  markers = {
    '1': function () { doStuff(); },
    '2': function () { doOtherStuff(); },
}
$('a').live('click',function(e){
    e.preventDefault();
    var id = $(this).attr('id');
    infowindow2.open(map, markers[id]);
});

Answer 3

EVAL should always be the last option

In order use dynamic name in a function names you can windows object.

Here is an Example:

var id = '2';
function map2() {
    alert('me called');
}
window["map"+id]();

Demo

Your Usage would be something like this

$('a').on('click',function(e){
    e.preventDefault();
    var id = $(this).attr('id');
    infowindow2.open(map, window['map'+id]()); 
});

Answer 4

I think it would be easier to write a new function with a switch. I can't recommend using eval.

Answer 5

$('a').live('click',function(e){
    e.preventDefault();
    var id = $(this).attr('id');
    infowindow2.open(map, eval('marker' + id)); 
});

LIVE DEMO

Notes:

• eval is deprecated, You should look for a better design.
• so as live ... You should use on instead.