jquery getScript function never fails?

问题

The jQuery getScript fail function is never called. See this fiddle: http://jsfiddle.net/getsetbro/8xNMs/

$.getScript("http://api.jquery.com/scripts/jquery.NO-SUCH-FILE.js").done(function() {
    console.log('yep');
}).fail(function() {
    console.log('fail function does not fire fine');
});

And the complete function is never called: http://jsfiddle.net/getsetbro/ns6yQ/

$.ajax({
    url: url,
    type: 'get',
    crossDomain: true,
    dataType: 'script',
    async:false,
    cache:false,
    success: function(result) {
        console.log('SUCCESS');
    },
    error: function(result) {
        console.log('ERROR');
    },
    complete: function(result) {
        console.log('COMPLETE');
    }
})

Oh, and in IE it actually fires SUCCESS and COMPLETE when it should have failed. =[

回答1:

.fail is not working for cross-domain request.

// Bind script tag hack transport
jQuery.ajaxTransport( "script", function(s) {

    // This transport only deals with cross domain requests
    if ( s.crossDomain ) {
    ...
    script = document.createElement( "script" );

Script element fires no errors and such.

But it's ok for same domain. http://jsfiddle.net/8xNMs/2/

回答2:

cross-domain .fail & .always work with jQuery 2.0

$.getScript("http://api.jquery.com/scripts/NO-SUCH-FILE.js")
  .done(function() {
    console.log("done fired");
  }).fail(function() {
    console.log("fail fired");
  }).always(function() {
    console.log("always fired");
});

http://jsfiddle.net/c2gyy/1/

来源：https://stackoverflow.com/questions/13476497/jquery-getscript-function-never-fails