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<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>修改表单属性</title>
</head><body><!-- <input type="text" value="电脑"> --><input type="checkbox" name="" id=""><button>点击</button><script>// 1.获取元素// const uname = document.querySelector('input')// 2.获取值 // console.log(uname.value) //获取表单里的值用表单.value// console.log(uname.innerHTML)//得不到// 3.设置表单的值// uname.value = '我要买电脑'// uname.type = 'password'// 1.获取checkboxconst ipt = document.querySelector('input')console.log(ipt.checked)//输出false 只接受布尔值// 2.获取bottunconst button = document.querySelector('button')console.log(button.disabled)//默认false，不禁用button.disabled = true//此时禁用按钮</script>
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