我正在使用ES5开发一个部分在Vue的网站。
我需要将Vue Child组件中的数据发送回父级,向我解释的方式是使用export default {}
然而我不断收到语法错误,我不知道为什么因为来自我所看到的,我正在关注Mozillas的推荐。
我的问题组成部分:
var question = Vue.component('question', {
props: {
scenarios: Array,
scenario: Object,
post: Boolean
},
data: function () {
return ({
choice: 0,
counter: 0,
finished: false
});
},
export default {
methods: {
onClickButton: function (event) {
this.$emit('clicked', 'someValue')
},
postResponse: function () {
var formData = new FormData();
formData.append(this.choice);
// POST /someUrl
this.$http.post('Study/PostScenarioChoice', formData).then(response => {
// success callback
}, response => {
// error callback
});
},
activatePost: function () {
if (this.counter < this.scenarios.length) {
this.counter++;
}
else {
this.finished = true;
}
}
}
},
template:
`<div>
<div v-if="this.finished === false" class="row justify-content-center">
<div class="col-lg-6">
<button class="btn btn-light" href="#" v-on:click="this.onClickButton">
<img class="img-fluid" v-bind:src="this.scenarios[this.counter].scenarioLeftImg" />
</button>
</div>
<div class="col-lg-6">
<button class="btn btn-light" href="#" v-on:click="this.onClickButton">
<img class="img-fluid" v-bind:src="this.scenarios[this.counter].scenarioRightImg" />
</button>
</div>
</div>
<finished v-else></finished>
</div >
});
我在浏览器控制台Expected ':'
中收到错误,该错误位于export default {
非常感谢任何帮助。
答案 0 :(得分:1)
您编写的JavaScript语法完全错误。你在这里要做的是将“导出默认值”放在对象键应该去的地方。我将在这里提供正确的代码,但我强烈建议你去学习JavaScript的基础知识,包括数组和对象,以便能够读写正确有效的JavaScript。这是一些适合初学者的好学习材料:
这是固定的Vue组件:
export default Vue.component("question", {
props: {
scenarios: Array,
scenario: Object,
post: Boolean
},
data: function () {
return ({
choice: 0,
counter: 0,
finished: false
});
},
methods: {
onClickButton: function (event) {
this.$emit("clicked", "someValue");
},
postResponse: function () {
var formData = new FormData();
formData.append(this.choice);
// POST /someUrl
this.$http.post("Study/PostScenarioChoice", formData).then(response => {
// success callback
}, response => {
// error callback
});
},
activatePost: function () {
if (this.counter < this.scenarios.length) {
this.counter++;
}
else {
this.finished = true;
}
}
},
template:
`<div>
<div v-if="this.finished === false" class="row justify-content-center">
<div class="col-lg-6">
<button class="btn btn-light" href="#" v-on:click="this.onClickButton">
<img class="img-fluid" v-bind:src="this.scenarios[this.counter].scenarioLeftImg" />
</button>
</div>
<div class="col-lg-6">
<button class="btn btn-light" href="#" v-on:click="this.onClickButton">
<img class="img-fluid" v-bind:src="this.scenarios[this.counter].scenarioRightImg" />
</button>
</div>
</div>
<finished v-else></finished>
</div>`
});
答案 1 :(得分:0)
实际答案是对所提供信息的简单误解here。在我的实现中使用导出默认值是无关紧要的,但是在我开始注意稍后发布父元素的emit之前,这是不容易看到的。
实际实施情况如下:
var question = Vue.component('question', {
props: {
scenarios: Array,
scenario: Object,
post: Boolean,
counter: Number
},
data: function () {
return ({
choice: 0,
finished: false
});
},
methods: {
onClickButton: function (event) {
this.$emit('clicked', 'someValue');
},
postResponse: function () {
var formData = new FormData();
formData.append(this.choice);
// POST /someUrl
this.$http.post('Study/PostScenarioChoice', formData).then(response => {
// success callback
}, response => {
// error callback
});
}
},
template:
`<div>
<div v-if="this.finished === false" class="row justify-content-center">
<div class="col-lg-6">
<button class="btn btn-light" href="#" v-on:click="this.onClickButton">
<img class="img-fluid" v-bind:src="this.scenarios[this.counter].scenarioLeftImg" />
</button>
</div>
<div class="col-lg-6">
<button class="btn btn-light" href="#" v-on:click="this.onClickButton">
<img class="img-fluid" v-bind:src="this.scenarios[this.counter].scenarioRightImg" />
</button>
</div>
</div>
<finished v-else></finished>
</div >`
});
父元素中的接收方法如下:
onClickChild: function (value) {
console.log(value) // someValue
this.showTimer = true;
this.countdownTimer();
if (this.counter < this.scenarios.length) {
this.counter++;
}
else {
this.finished = true;
}
}