javascript - 如何在javascript中的setAttribute()方法中将参数添加到函数中

Question

在 javascript 中，我正在创建新的图像标签并使用 setAttribute() 方法向它们添加属性，但我发现如果我添加一个 onclick 事件并添加一个函数，我无法为其设置参数如下所示

count = 0; //Will be the number that will go into parameter for function
function start() {
imageTag = document.createElement("IMG"); //Creates image tag
imageTag.setAttribute("src", "popo.jpg"); //sets the image tags source
count++; //as the start function keeps getting called, count will increase by 1 and the parameter for each function in each individual image tag will increase by one
imageTag.setAttribute("onclick", "disappear(count)"); //this will add the onclick attribute with the function disappear() and the parameter inside which will be a number that will increase as the start function is called again and the image tag is called again *ERROR*
document.body.appendChild(imageTag); //appends the image tag created
}

问题是，当创建每个新图像标签时，它实际上只是创建

<img src = "popo.jpg" onclick = "disappear(count)"/>

我希望它更像

<img src = "popo.jpg" onclick = "disappear('1')"/>
<img src = "popo.jpg" onclick = "disappear('2')"/> //and so on...

Answer 1

在函数中添加计数作为参数，而不是字符串。

count = 0; //Will be the number that will go into parameter for function
function start() {
    imageTag = document.createElement("IMG"); //Creates image tag
    imageTag.setAttribute("src", "popo.jpg"); //sets the image tags source
    count++; //as the start function keeps getting called, count will increase by 1 and the parameter for each function in each individual image tag will increase by one
    imageTag.setAttribute("onclick", "disappear("+count+")"); //this will add the onclick attribute with the function disappear() and the parameter inside which will be a number that will increase as the start function is called again and the image tag is called again *ERROR*
    document.body.appendChild(imageTag); //appends the image tag created
}