Vuejs2 在vuejs中选择选项时,如何获取optgroup标签?
我想在选择选项时获取国家组名称。我有几个国家有这样的团体Vuejs2 在vuejs中选择选项时,如何获取optgroup标签?,vuejs2,Vuejs2,我想在选择选项时获取国家组名称。我有几个国家有这样的团体 <template> <select id="countries" v-model="country" @change="getCountryGroup($event)"> <optgroup label="Asia"> <option value="AF">Afghanistan</option> <
<template>
<select id="countries" v-model="country" @change="getCountryGroup($event)">
<optgroup label="Asia">
<option value="AF">Afghanistan</option>
<option value="AM">Armenia</option>
<option value="AZ">Azerbaijan</option>
...
<option value="BD">Bangaldesh</option>
...
</optgroup>
<optgroup label="Australia / Oceania">
<option value="AS">American Samoa</option>
<option value="AU">Australia</option>
<option value="CK">Cook Islands</option>
</optgroup>
<optgroup label="Africa">
<option value="DZ">Algeria</option>
<option value="AM">Angola</option>
<option value="AZ">Azerbaijan</option>
</optgroup>
<optgroup label="South America">
<option value="AR">Argentina</option>
<option value="BO">Bolivia</option>
<option value="BR">Brazil</option>
</optgroup>
<optgroup label="North America">
<option value="US">United States</option>
<option value="UM">United States Minor Outlying Islands</option>
<option value="CA">Canada</option>
</optgroup>
<optgroup label="Europe">
<option value="UK">United Kingdom</option>
<option value="AL">Albania</option>
<option value="AD">Andorra</option>
</optgroup>
</select>
</template>
这里有两个步骤
这是演示文稿
,你可能想考虑把这些国家拉到合适的数据结构,而不是硬编码它们直接进入模板。一旦获得了数据作为数据,就不需要从DOM中提取数据。getCountryGroup: function(event){
console.log( event.target.getAttribute('label') );
}
getCountryGroup: function(event){
// 1. Get the selected index
const index = event.target.selectedIndex;
// 2. Find the selected option
const option = event.target.options[index];
// 3. Select the parent element (optgroup) for the selected option
const optgroup = option.parentElement;
// 4. Finally, get the label (Country group)
const countryGroup = optgroup.getAttribute('label');
console.log(countryGroup);
}