[英]Trying to use Select2 in a Vue Component, but options are blank?
我有一个可用的 Vue 组件,它当前为这样的选择呈现选项:
<select ref="subdomain_id" name="subdomain_id" id="newEvidenceSubdomain" class="form-control" :class="{ 'is-invalid': errors.subdomain_id }" v-model="subdomain">
<option value="none" selected disabled hidden></option>
<option v-for="choice in subdomains" :value="choice" >[[ choice.character_code ]]</option>
</select>
<div class="invalid-feedback" v-for="error in errors.subdomain_id">
[[ error ]]<br />
</div>
我正在尝试将其转换为 Select2 元素,以便用户更轻松地使用下拉列表。
我在模板中有这个:
<div>
<p>Selected: {{ selected }}</p>
<select2 :subdomains="choices" v-model="subdomain">
<option disabled value="0">Select one</option>
</select2>
</div>
Vue 的其余部分如下所示:
<script type="text/x-template" id="select2-template">
<select>
<slot></slot>
</select>
</script>
<script>
Vue.component("select2", {
props: ["subdomains", "value"],
template: "#select2-template",
mounted: function() {
var vm = this;
$(this.$el)
// init select2
.select2({ data: this.subdomains })
.val(this.value)
.trigger("change")
// emit event on change.
.on("change", function() {
console.log('this a thing')
vm.$emit("input", this.value);
});
},
watch: {
value: function(value) {
// update value
console.log($(this.$el))
$(this.$el)
.val(value)
.trigger("change");
},
subdomains: function(subdomains) {
// update subdomains
$(this.$el)
.empty()
.select2({ data: subdomains });
}
},
destroyed: function() {
$(this.$el)
.off()
.select2("destroy");
}
});
</script>
'subdomains' 是我希望呈现的选项列表(如您在工作 HTML 版本中所见)。
当我尝试将其设为 Select2 对象时,我看到数据的“点”(就像它在那里,但空白); 但它只是一个带有隐形选项的选择。
我已经尝试了各种各样的东西,但也许我误解了它应该如何呈现?
所有帮助表示赞赏!
subdomains
不能直接传递给select2
, select2
的数据格式应该像{id:"", text:""}
。 以下是基于您的代码的工作版本。
<html> <head> <script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.js"></script> <script src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script> <link href="https://cdn.jsdelivr.net/npm/select2@4.1.0-rc.0/dist/css/select2.min.css" rel="stylesheet" /> <script src="https://cdn.jsdelivr.net/npm/select2@4.1.0-rc.0/dist/js/select2.min.js"></script> </head> <body> <div id="app"> <select2 :subdomains="choices" v-model="subdomain"> <option disabled value="0">Select one</option> </select2> </div> <script type="text/x-template" id="select2-template"> <select> <slot></slot> </select> </script> <script> function select2data(subdomains) { return subdomains.map((d)=>({id:d.character_code, text:d.character_code})); } Vue.component("select2", { props: ["subdomains", "value"], template: "#select2-template", mounted: function() { var vm = this; let s2 = $(this.$el) // init select2 .select2({ data: select2data(this.subdomains), width: '200px'}) // emit event on change. .on("change", function(val) { vm.$emit("input", vm.subdomains.find((d)=>d.character_code == this.value)); }); }, watch: { value: function(value) { // update value if (value && value.character_code != this.$el.value) { $(this.$el).val(value.character_code); } }, subdomains: function(subdomains) { // update subdomains $(this.$el) .empty() .select2({ data: select2data(subdomains) }); } }, destroyed: function() { $(this.$el) .off() .select2("destroy"); } }); let subdomains = [{ "other_fields":"xxxxxxx", "character_code": "abc.com" }, { "other_fields":"oooooooo", "character_code": "efg.com" }]; let app = new Vue({ el: '#app', data: { choices:subdomains, subdomain:subdomains[0] }, watch:{ subdomain:function(newVal) { console.log('subdomain changed', newVal.character_code); } } }); </script> </body> </html>
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