JS XMLHttpRequest作为功能不起作用

Question

I am a beginner and it may seem to you as a very dumb question, but I can't still figure out why this code doesn't work. URL is correct, server should respond, but still getting nothing.

function request(data, item) {
    var xhr = new XMLHttpRequest();
    xhr.onreadystatechange = function() {
        if (this.readyState == 4 && this.status == 200) {
            data = JSON.parse(xhr.responseText);
            return data;
        } else {
            alert("Something went wrong!");
        }
    };
    xhr.open("GET", "http://somewebsite.com/" + item, false);
    xhr.send();
}

items = ["item1", "item2", "item3"...];

for (var i=0; i>items.lenght; i++) {
        request(history, items[i]);
        // code for processing history object
}

I want to get JSON response saved in history and then process it

Answer 1

我弄错了length ，现在可以了，谢谢梅尔登！