js 输入长度固定

<input type="text" id="fixedLengthInput" maxlength="10">

<input type="text" id="fixedLengthInput">

<script>
document.getElementById('fixedLengthInput').addEventListener('input', function(event) {
    const maxLength = 10; // 设置最大长度
    if (this.value.length > maxLength) {
        this.value = this.value.slice(0, maxLength); // 截断超出部分
    }
});
</script>

document.getElementById('fixedLengthInput').addEventListener('paste', function(event) {
    const maxLength = 10;
    setTimeout(() => {
        if (this.value.length > maxLength) {
            this.value = this.value.slice(0, maxLength);
        }
    }, 0);
});