[英]How can I upload image use ajax on the vue.js 2?
我的组件vue是这样的:
<template>
<div class="modal" tabindex="-1" role="dialog">
<div class="modal-dialog" role="document">
<div class="modal-content">
<form method="post" :action="baseUrl+'/product/editImage'" enctype="multipart/form-data">
...
<input type="file" v-on:change="changeImage" name="image" id="image" required>
...
</form>
</div>
</div>
</div>
</template>
<script>
export default{
...
methods: {
changeImage(e) {
data = new FormData();
data.append('file', $('#image')[0].files[0]);
var imgname = $('#image').val();
var size = $('#image')[0].files[0].size;
var ext = imgname.substr( (imgname.lastIndexOf('.') +1) );
if(ext=='jpg' || ext=='jpeg' || ext=='png' || ext=='gif' || ext=='PNG' || ext=='JPG' || ext=='JPEG') {
if(size<=5000000) {
$.ajax({
url: window.Laravel.baseUrl+'/product/addImage',
type: "POST",
data: data,
enctype: 'multipart/form-data',
processData: false, // tell jQuery not to process the data
contentType: false // tell jQuery not to set contentType
}).done(function(data) {
if (!$.trim(data)) {
alert('No response');
}
else {
var files = e.target.files || e.dataTransfer.files
if (!files.length)
return;
this.createImage(files[0])
this.imageChanged = files[0]
$('#image').val(data);
}
});
return false;
}
else {
alert('Sorry File size exceeding from 5 Mb');
$('#image').val('');
}
}
else {
alert('Sorry Only you can uplaod JPEG|JPG|PNG|GIF file type ');
}
},
createImage(file) {
var image = new Image()
var reader = new FileReader()
var vm = this
reader.onload = (e) => {
vm.image = e.target.result
};
reader.readAsDataURL(file)
},
}
}
</script>
我仍然在vue.js中使用javascript 2.因为我在使用vue.js时仍然感到困惑
当我上传图片时,会出现如下错误:
未捕获的ReferenceError:未定义数据
似乎data = new FormData(); 没有在vue.js上工作
我试过它使用JavaScript,它的工作原理
但是当我将它实现到vue.js时,它不起作用
我该如何解决这个问题?
为了更好地利用Vue,我重新编写了一些代码。 除了ajax提交之外,不再使用jQuery。
new Vue({
el:"#app",
data:{
allowableTypes: ['jpg', 'jpeg', 'png', 'gif'],
maximumSize: 5000000,
selectedImage: null,
image: null,
options:{
url: 'https://httpbin.org/post',
type: "POST",
processData: false,
contentType: false
}
},
methods: {
validate(image) {
if (!this.allowableTypes.includes(image.name.split(".").pop().toLowerCase())) {
alert(`Sorry you can only upload ${this.allowableTypes.join("|").toUpperCase()} files.`)
return false
}
if (image.size > this.maximumSize){
alert("Sorry File size exceeding from 5 Mb")
return false
}
return true
},
onImageError(err){
console.log(err, 'do something with error')
},
changeImage($event) {
this.selectedImage = $event.target.files[0]
//validate the image
if (!this.validate(this.selectedImage))
return
// create a form
const form = new FormData();
form.append('file', this.selectedImage);
// submit the image
$.ajax(Object.assign({}, this.options, {data: form}))
.then(this.createImage)
.catch(this.onImageError);
},
createImage() {
const image = new Image()
const reader = new FileReader()
reader.onload = (e) => {
this.image = e.target.result
};
reader.readAsDataURL(this.selectedImage)
},
}
})
模板
<div id="app">
<input type="file" v-on:change="changeImage" name="image">
<input v-if="selectedImage" v-model="selectedImage.name" type="hidden" name="photo" />
{{image}}
</div>
例子 。
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