解決包含在label標(biāo)簽下的checkbox在ie8及以下版本點(diǎn)擊事件無效果兼容的問題

發(fā)布時(shí)間：2020-10-16 02:08:21 來源：腳本之家閱讀：153 作者：盜夢(mèng)少年欄目：web開發(fā)

問題描述：

在IE8及以下版本時(shí)，點(diǎn)擊label標(biāo)簽無法自動(dòng)觸發(fā)checkbox的click事件，導(dǎo)致無法產(chǎn)生希望的效果。

原HTML代碼：

 <div class="col-sm-2">
    <label><input type="checkbox" id="chk_sqjc" value="申請(qǐng)檢查" name="menu" class="cbr cbr-blue">申請(qǐng)檢查</label>
 </div>

$("input:checkbox[name='menu']").each(function (index, element) {
        $(this).click(function () {
          if ($(this).attr("checked") != undefined) {
            $(this).removeAttr("checked");
            var menues = $("#selmenues").val();
            var arrMenues = menues.split(',');
            if (arrMenues.length > 0) {
              arrMenues.forEach(function (val) {
                //console.log(element.value);
                if (element.value == val) {
                  arrMenues.splice($.inArray(val, arrMenues), 1);
                }
              });
              menues = "";
              arrMenues.forEach(function (val) {
                menues += val + ',';
              });
              menues = menues.substring(0, menues.length - 1)
              //console.log(menues);
              $("#selmenues").val(menues);
              //console.log($("#selmenues").val());
            }

          } else {
            $(this).attr("checked", "checked");
            var menues = $("#selmenues").val();
            var arrMenues = menues.split(',');
            if (arrMenues.length > 0) {
              arrMenues.push($(this).val());
              menues = "";
              arrMenues.forEach(function (val) {
                menues += val + ',';
              });
              menues = menues.substring(0, menues.length - 1)
              //console.log(menues);
            }
            else {
              menues += $(this).val() + ',';
            }
            $("#selmenues").val(menues);
            //console.log($("#selmenues").val());
          }
        })
      });

根本原因：因?yàn)閕e8不支持事件傳遞，當(dāng)點(diǎn)擊藍(lán)色的框框時(shí)，觸發(fā)了label的click事件而并沒有觸發(fā)其中checkbox標(biāo)簽的click事件。

解決方式：我們可以修改html代碼，將label標(biāo)簽和checkbox標(biāo)簽通過id屬性關(guān)聯(lián)，同時(shí)給label加上name屬性，將事件處理放在label標(biāo)簽上。

新HTML代碼：

 <div class="col-sm-2">
   <label name="lbl_menu" id="sqjc"><input type="checkbox" id="chk_sqjc" value="申請(qǐng)檢查" name="menu" class="cbr cbr-blue">申請(qǐng)檢查</label>
</div>

$("label[name='lbl_menu']").each(function (index, element) {
        $(this).click(function () {
          //console.log($('input#chk_' + this.id).attr("checked"));
          if ($('input#chk_' + this.id).attr("checked") != undefined) {
            $('input#chk_' + this.id).removeAttr("checked");
            //$('input#chk_' + this.id).trigger("click");
            $('div').filter('.cbr-replaced.cbr-blue').eq(index).removeClass('cbr-checked');
            var menues = $("#selmenues").val();
            var arrMenues = menues.split(',');
            if (arrMenues.length > 0) {
              arrMenues.forEach(function (val) {
                //console.log(element.value);
                if (element.value == val) {
                  arrMenues.splice($.inArray(val, arrMenues), 1);
                }
              });
              menues = "";
              arrMenues.forEach(function (val) {
                menues += val + ',';
              });
              menues = menues.substring(0, menues.length - 1)
              //console.log(menues);
              $("#selmenues").val(menues);
              //console.log($("#selmenues").val());
            }
          } else {
            $('input#chk_' + this.id).attr("checked", "checked");
            // console.log($('input#chk_' + this.id).attr("checked"));
            //$('input#chk_' + this.id).trigger("click");
            // console.log($('.cbr-replaced.cbr-blue')[index]);
            $('div').filter('.cbr-replaced.cbr-blue').eq(index).addClass('cbr-checked');
            var menues = $("#selmenues").val();
            var arrMenues = menues.split(',');
            if (arrMenues.length > 0) {
              arrMenues.push($('input#chk_' + this.id).val());
              menues = "";
              arrMenues.forEach(function (val) {
                menues += val + ',';
              });
              menues = menues.substring(0, menues.length - 1)
              //console.log(menues);
            }
            else {
              menues += $('input#chk_' + this.id).val() + ',';
            }
            $("#selmenues").val(menues);
            //console.log($("#selmenues").val());
          }
        })
      });

最后加一下IE版本的判斷代碼就完美了。

完整JS代碼

var DEFAULT_VERSION = 8.0;
    var ua = navigator.userAgent.toLowerCase();
    var isIE = ua.indexOf("msie") > -1;
    var safariVersion;
    if (isIE) {
      safariVersion = ua.match(/msie ([\d.]+)/)[1];
    }
    if (safariVersion <= DEFAULT_VERSION) {
      $("label[name='lbl_menu']").each(function (index, element) {
        $(this).click(function () {
          //console.log($('input#chk_' + this.id).attr("checked"));
          if ($('input#chk_' + this.id).attr("checked") != undefined) {
            $('input#chk_' + this.id).removeAttr("checked");
            //$('input#chk_' + this.id).trigger("click");
            $('div').filter('.cbr-replaced.cbr-blue').eq(index).removeClass('cbr-checked');
            var menues = $("#selmenues").val();
            var arrMenues = menues.split(',');
            if (arrMenues.length > 0) {
              arrMenues.forEach(function (val) {
                //console.log(element.value);
                if (element.value == val) {
                  arrMenues.splice($.inArray(val, arrMenues), 1);
                }
              });
              menues = "";
              arrMenues.forEach(function (val) {
                menues += val + ',';
              });
              menues = menues.substring(0, menues.length - 1)
              //console.log(menues);
              $("#selmenues").val(menues);
              //console.log($("#selmenues").val());
            }
          } else {
            $('input#chk_' + this.id).attr("checked", "checked");
            // console.log($('input#chk_' + this.id).attr("checked"));
            //$('input#chk_' + this.id).trigger("click");
            // console.log($('.cbr-replaced.cbr-blue')[index]);
            $('div').filter('.cbr-replaced.cbr-blue').eq(index).addClass('cbr-checked');
            var menues = $("#selmenues").val();
            var arrMenues = menues.split(',');
            if (arrMenues.length > 0) {
              arrMenues.push($('input#chk_' + this.id).val());
              menues = "";
              arrMenues.forEach(function (val) {
                menues += val + ',';
              });
              menues = menues.substring(0, menues.length - 1)
              //console.log(menues);
            }
            else {
              menues += $('input#chk_' + this.id).val() + ',';
            }
            $("#selmenues").val(menues);
            //console.log($("#selmenues").val());
          }
        })
      });
    }
    else {
      $("input:checkbox[name='menu']").each(function (index, element) {
        $(this).click(function () {
          if ($(this).attr("checked") != undefined) {
            $(this).removeAttr("checked");
            var menues = $("#selmenues").val();
            var arrMenues = menues.split(',');
            if (arrMenues.length > 0) {
              arrMenues.forEach(function (val) {
                //console.log(element.value);
                if (element.value == val) {
                  arrMenues.splice($.inArray(val, arrMenues), 1);
                }
              });
              menues = "";
              arrMenues.forEach(function (val) {
                menues += val + ',';
              });
              menues = menues.substring(0, menues.length - 1)
              //console.log(menues);
              $("#selmenues").val(menues);
              //console.log($("#selmenues").val());
            }
          } else {
            $(this).attr("checked", "checked");
            var menues = $("#selmenues").val();
            var arrMenues = menues.split(',');
            if (arrMenues.length > 0) {
              arrMenues.push($(this).val());
              menues = "";
              arrMenues.forEach(function (val) {
                menues += val + ',';
              });
              menues = menues.substring(0, menues.length - 1)
              //console.log(menues);
            }
            else {
              menues += $(this).val() + ',';
            }
            $("#selmenues").val(menues);
            //console.log($("#selmenues").val());
          }
        })
      });
    }

總結(jié)

以上所述是小編給大家介紹的解決包含在label標(biāo)簽下的checkbox在ie8及以下版本點(diǎn)擊事件無效果兼容的問題，希望對(duì)大家有所幫助，如果大家有任何疑問歡迎給我留言，小編會(huì)及時(shí)回復(fù)大家的！

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解決包含在label標(biāo)簽下的checkbox在ie8及以下版本點(diǎn)擊事件無效果兼容的問題

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