问题描述
let fireball; //global variable
fireball = document.createElement("img") //variable on local
fireballArray.push(someFunction(fireball,{
src: "img.png",width: "38" }))
fireball.style.display = "none" //global variable
我的目标是可以设置fireball = document.createElement("img")
的样式(在本例中为隐藏样式)
但是,document.createElement("img")
不会隐藏。有什么帮助吗?谢谢
警告:fireball = document.createElement("img")
该变量必须保留在本地范围和样式上。显示:任何变量都不得位于其他范围内(如代码所示)
解决方法
创建img时:
function myFunction() {
var fireball = document.createElement("img");
fireball.setAttribute("src","img_pulpit.jpg");
fireball.setAttribute("width","304");
fireball.setAttribute("height","228");
fireball.setAttribute("alt","The Pulpit Rock");
fireball.setAttribute("id","UniqId"); // It is important to set an uniq ID
document.body.appendChild(fireball);
}
然后应用集合,并通过ID getElementById
获得Element:
function myFunction2() {
var fireball = document.getElementById("UniqId");
fireball.setAttribute("style","display:none; border:3px solid red;");
document.body.appendChild(fireball);
}
您可以尝试使用w3C演示:https://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_img_create