JQuery函数问题:未捕获的ReferenceError [英] Problem with JQuery function: Uncaught ReferenceError

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问题描述



我编写了一个函数,它从一个div返回一个元素数组,每个元素都有一个属性数组(ID,位置,类型(图像或文本)和文本或图像资源)。我认为主要的问题是,我在运行时从ID - $(#Counter).text()for循环中生成一个选择器,而不是我在那里写的变量 selector.toString( ),但它通常给我一个位置,但它没有给出类 - 而不是某种类型,有写的undefined。在这个if条件下,它会抛出这个错误:未捕获的ReferenceError:无效的左手边

  if ($(selector.toString())。children()。first()。css(  class)=   img){





如何修复此错误或如何修复整个功能以执行我想要的操作?

这是整个功能评论:

  function  getAllElements(){
var elems = new Array (); // 为divplatno中的所有元素创建新数组。
for var i = parseInt 0); i< parseInt ($(< span class =code-string> #Counter)。text()); i ++){
var selector = + i; // 从实际i创建一个选择器,代表ID。
var elem = new Array (); // 为元素的所有属性创建一个数组
elem [ 0 ] = i; // 首先是ID
elem [ 1 ] = $(selector.toString())。position(); // second is position
elem [ 2 ] = $(selector.toString())。children()。first()。css( ); // 第三个是课程(文字或图片)
if ($(selector.toString())。children()。first()。css( class)= img){
elem [< span class =code-digit> 3
] = $(selector.toString())。children()。first()。css( src); // 第四个是图像源
}
else {
elem [ 3 ] = $(selector.toString())。children()。first()。text ; // 或第四个是元素的文本
}
elems [i] = elem; // 向所有元素的数组添加元素
}
返回 elems; // 返回所有元素
}





非常感谢您提供良好的解决方案!



Pepin z Hane

解决方案

(#Counter).text()for for循环而不是选择器我在那里写了变量 selector.toString(),但它给了我一个正常的位置,但是它没有给出类 - 而不是某种类型,有写的undefined。在这个if条件下,它会抛出这个错误:未捕获的ReferenceError:无效的左手边

  if 


(selector.toString())。children()。first()。css( class)= img){





如何修复此错误或如何修复整个函数以执行我想要的操作?

以下是评论的整个函数:

  function  getAllElements(){
var elems = new Array (); // 为divplatno中的所有元素创建新数组。
for var i = parseInt 0); i< parseInt

#Counter)。text()); i ++) {
var selector = + i; // 从实际i创建一个选择器,代表ID。
var elem = new Array (); // 为元素的所有属性创建一个数组
elem [ 0 ] = i; // 首先是ID
elem [ 1 ] =


Hi,
I have written a function that returns an Array of elements from one div and each element has an Array of attributes (ID, position, type(image or text) and text or image source). I think the main problem is, that I am generating a selector in the runtime from the ID - $(#Counter).text() in for cycle and instead of a selector I have written there the variable selector.toString(), but it gives me for example a position normally, but it doesn''t give the class - instead of some type, there is written undefined. And in this if condition it throws this error: Uncaught ReferenceError: Invalid left-hand side in assigment

if ($(selector.toString()).children().first().css("class") = "img") {



How to fix this error or how fix the whole function to do what I want?
Here is the whole function commented:

function getAllElements() {
            var elems = new Array();    //creates new Array for all elements in div "platno".
            for (var i = parseInt("0"); i < parseInt($("#Counter").text()); i++) {
                var selector = "#" + i; //creates a selector from actual i, which represents ID.
                var elem = new Array(); // creates an Array for all attributes of an element
                elem[0] = i;    //first is ID
                elem[1] = $(selector.toString()).position();    //second is position
                elem[2] = $(selector.toString()).children().first().css("class"); //third is class (text or image)
                if ($(selector.toString()).children().first().css("class") = "img") {
                    elem[3] = $(selector.toString()).children().first().css("src");  //fourth is image source
                }
                else {
                    elem[3] = $(selector.toString()).children().first().text;   //or fourth is text of an element
                }
                elems[i] = elem;    // adds an element to Array of all elements
            }
            return elems;   //returns all elements
        }



Thanks a lot for good solutions!

Pepin z Hane

解决方案

(#Counter).text() in for cycle and instead of a selector I have written there the variable selector.toString(), but it gives me for example a position normally, but it doesn''t give the class - instead of some type, there is written undefined. And in this if condition it throws this error: Uncaught ReferenceError: Invalid left-hand side in assigment

if (


(selector.toString()).children().first().css("class") = "img") {



How to fix this error or how fix the whole function to do what I want?
Here is the whole function commented:

function getAllElements() {
            var elems = new Array();    //creates new Array for all elements in div "platno".
            for (var i = parseInt("0"); i < parseInt(


("#Counter").text()); i++) { var selector = "#" + i; //creates a selector from actual i, which represents ID. var elem = new Array(); // creates an Array for all attributes of an element elem[0] = i; //first is ID elem[1] =


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