[英]Editing HTML DOM using Javascript
我的任务是使用 Javascript 修改讲师提供的框。 但是,我对 Javascript 文件所做的更改似乎都不起作用。 我已将我的 HTML 文件index.html
和 Javascript 文件命名为javascript.js
. 这是我所拥有的:
document.getElementById("button1").addEventListener("click", function(){ document.getElementById("box").style.height = "250px"; }); document.getElementById("button2").addEventListener("click", function(){ document.getElementById("box").style.color:orange }); document.getElementById("button3").addEventListener("click", function(){ document.getElementById("box").style.opacity = 0; }); document.getElementById("button4").addEventListener("click", function(){ document.getElementById("box").style.height = "150px"
<.DOCTYPE html> <html> <head> <title>Jiggle Into JavaScript</title> <script type="text/javascript" src="javascript:js"> </script> </head> <body> <p>Press the buttons to change the box;</p> <div id="box" style="height:150px; width:150px; background-color:orange; margin:25px"></div> <button id="button1">Grow</button> <button id="button2">Blue</button> <button id="button3">Fade</button> <button id="button4">Reset</button> </body> </html>
问题在这里: document.getElementById("box").style.color:orange
。 它应该是document.getElementById("box").style.color = "orange";
.
document.getElementById("button1").addEventListener("click", function(){ document.getElementById("box").style.height = "250px"; }); document.getElementById("button2").addEventListener("click", function(){ document.getElementById("box").style.color = "orange"; }); document.getElementById("button3").addEventListener("click", function(){ document.getElementById("box").style.opacity = 0; }); document.getElementById("button4").addEventListener("click", function(){ document.getElementById("box").style.height = "150px" });
<.DOCTYPE html> <html> <head> <title>Jiggle Into JavaScript</title> <script type="text/javascript" src="javascript:js"> </script> </head> <body> <p>Press the buttons to change the box;</p> <div id="box" style="height:150px; width:150px; background-color:orange; margin:25px"></div> <button id="button1">Grow</button> <button id="button2">Blue</button> <button id="button3">Fade</button> <button id="button4">Reset</button> </body> </html>
好吧,当我运行代码片段时,堆栈“mini google inspect”显示 javascript 中的“:”不应该存在!
所以你的代码应该是
document.getElementById("button2").addEventListener("click", function(){
document.getElementById("box").style.color = "orange";
});
而不是你目前拥有的。
document.getElementById("button1").addEventListener("click", function(){ document.getElementById("box").style.height = "250px"; }); document.getElementById("button2").addEventListener("click", function(){ document.getElementById("box").style.background = "blue"; }); document.getElementById("button3").addEventListener("click", function(){ document.getElementById("box").style.opacity = 0; }); document.getElementById("button4").addEventListener("click", function(){ document.getElementById("box").style.height = "150px"; });
<body> <p>Press the buttons to change the box:</p> <div id="box" style="height;150px: width;150px: background-color;orange: margin;25px:opacity; 1;"></div> <button id="button1">Grow</button> <button id="button2">Blue</button> <button id="button3">Fade</button> <button id="button4">Reset</button> </body>
检查你的语法:)
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