解决包含在label标签下的checkbox在ie8及以下版本点击事件无效果兼容的问题

问题描述:

    在IE8及以下版本时,点击label标签无法自动触发checkbox的click事件,导致无法产生希望的效果。

解决包含在label标签下的checkbox在ie8及以下版本点击事件无效果兼容的问题

原HTML代码:

  <div class="col-sm-2">
<label><input type="checkbox" id="chk_sqjc" value="申请检查" name="menu" class="cbr cbr-blue">申请检查</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());
}
})
});

Checkbox点击事件JS代码

根本原因:因为ie8不支持事件传递,当点击蓝色的框框时,触发了label的click事件而并没有触发其中checkbox标签的click事件。

解决方式:我们可以修改html代码,将label标签和checkbox标签通过id属性关联,同时给label加上name属性,将事件处理放在label标签上。

新HTML代码:

 <div class="col-sm-2">
<label name="lbl_menu" id="sqjc"><input type="checkbox" id="chk_sqjc" value="申请检查" name="menu" class="cbr cbr-blue">申请检查</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());
}
})
});

Label点击事件JS代码

最后加一下IE版本的判断代码就完美了。

 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());
}
})
});
}

完整JS代码

初来乍到,这是本人在开发过程中遇到的小问题,简单总结了一下,分享给请大家,写的不好请多多见谅,转载请注明出处,谢谢!!

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