输入框自动切换光标demo

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关于多输入框自动切换光标及粘贴功能(代码仅供参考可以直接用)

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//js代码:如下功能实现了输入框的粘贴切换光标问题


//按多长间隔截取字符串，n为长度，返回按长度分割成的字符串数组；
String.prototype.StrCut2Arr = function (n) {
    var str = this;
    var arr = [];
    var len = Math.ceil(str.length / n);
    for (var i = 0; i < len; i++) {
        if (str.length >= n) {
            var strCut = str.substring(0, n);
            arr.push(strCut);
            str = str.substring(n);
        } else {
            str = str;
            arr.push(str);
        }
    }
    return arr;
}


$('.slinput').bind('input propertychange', function () {
    // 删除往前 添加往后
    $(this).index();
    if ("slinput" == this.className) {
        var thisName = this.name;
        if ($("#" + thisName).val().trim().length == 4) {
            $(this).next('input').focus();
        } else if ($("#" + thisName).val().trim().length > 4) {
            var strContent = $("#" + thisName).val().trim().replace(/-/g, "");
            $('.slinput').val("");
            const foo = strContent.StrCut2Arr(4);
            if (foo.length >= 4) {
                for (let i = 0; i < 4; i++) {
                    let inputIndex = $(".slinput").get(i);
                    let inputName = inputIndex.name;
                    $("#" + inputName).val(foo[i]);
                }
            } else {
                for (let i = 0; i < foo.length; i++) {
                    let inputIndex = $(".slinput").get(i);
                    let inputName = inputIndex.name;
                    $("#" + inputName).val(foo[i]);
                }
            }

        }
        if ($("#" + thisName).val().trim().length < 1) {
            $(this).prev('input').focus();
        }
    }
})

//简单的输入框切换光标代码如下：

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$('#num_input input').keyup(function (event) {
    // 删除往前 添加往后
        var this_name = this.name;
        // .trim()
        if ($("#" + this_name).val().trim().length >= 4) {
            $(this).next('input').focus();
        }
        if ($("#" + this_name).val().trim().length < 1) {
            if (event.keyCode == 46 || event.keyCode == 8) {
                $(this).prev('input').focus();
            }
        }
})

注：根据自身业务的需求上面两组代码任选一种即可。

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//页面代码如下：

<div class="slbh" id="num_input">
    <input type="text" placeholder="xxxx" class="slinput" style="margin-left: 0;" name="sic_a"
           id="sic_a" onfocus="this.placeholder=''" onblur="this.placeholder='xxxx'"/>
    <input type="text" placeholder="xxxx" class="slinput" name="sic_b" id="sic_b"
           onfocus="this.placeholder=''" onblur="this.placeholder='xxxx'"/>
    <input type="text" placeholder="xxxx" class="slinput" name="sic_c" id="sic_c"
           onfocus="this.placeholder=''" onblur="this.placeholder='xxxx'"/>
    <input type="text" placeholder="xx" maxlength="2" class="slinput" name="sic_d" id="sic_d"
           onfocus="this.placeholder=''" onblur="this.placeholder='xx'"/>
</div>