想问一下这段简单的代码为什么没有实现全选的目的


html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Documenttitle>
head>
<body>
    <input type="checkbox" id="ipt1">
    <input type="checkbox" id="ipt2">
    <script>
        var ipt1 = document.getElementByid('ipt1');
        var ipt2 = document.getElementById('ipt2');
        ipt1.onclick = function(){
            ipt2.checked = this.checked;
        }
    script>
body>
html>

第14行getElementByid拼错了
应该是
getElementById

 <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <input type="checkbox" id="ipt1">
    <input type="checkbox" id="ipt2">
    <script>
        var ipt1 = document.getElementById('ipt1');
        var ipt2 = document.getElementById('ipt2');
        ipt1.onclick = function(){
            ipt2.checked = this.checked;
        }
    </script>
</body>
</html>