Mixing
Cannot preview images in Vue.js
After following on this greate tutorial to make a multi-file upload component in Vue.js, I'd like to be able to let users to preview images before uploading them. So I try to add a uri field to each photo file, in order to show them in a v-for loop like this:
<div v-for="(file, index) in files" :key="index">
<img :src="file.uri" alt="Image">
</div>
Here is the method to select files:
selectFile() {
const files = this.$refs.files.files;
this.uploadFiles = [...this.uploadFiles, ...files];
this.files = [
...this.files,
..._.map(files, file => ({
name: file.name,
type: file.type,
invalidMessage: this.validate(file)
}))
];
this.files.forEach( function (file) {
let reader = new FileReader();
file.uri = reader.readAsDataURL(file); //<-Problem here
}
);
Here is the error message:
Uncaught TypeError: Failed to execute 'readAsDataURL' on 'FileReader': parameter 1 is not of type 'Blob'.
I know there are a couple other questions on SO about this error, but none helped me, perhaps because none deals with file in a loop as I do here with Vue.js.
I have also looked at Mozilla docs, but could not adopt their example to this situation.
Really appreciate your hints to fix this.
javascript vue.js image-uploading
asked Jan 1 at 19:00
KarlomKarlom
2,15042658
add a comment |
After following on this greate tutorial to make a multi-file upload component in Vue.js, I'd like to be able to let users to preview images before uploading them. So I try to add a uri field to each photo file, in order to show them in a v-for loop like this:
<div v-for="(file, index) in files" :key="index">
<img :src="file.uri" alt="Image">
</div>
Here is the method to select files:
selectFile() {
const files = this.$refs.files.files;
this.uploadFiles = [...this.uploadFiles, ...files];
this.files = [
...this.files,
..._.map(files, file => ({
name: file.name,
type: file.type,
invalidMessage: this.validate(file)
}))
];
this.files.forEach( function (file) {
let reader = new FileReader();
file.uri = reader.readAsDataURL(file); //<-Problem here
}
);
Here is the error message:
Uncaught TypeError: Failed to execute 'readAsDataURL' on 'FileReader': parameter 1 is not of type 'Blob'.
I know there are a couple other questions on SO about this error, but none helped me, perhaps because none deals with file in a loop as I do here with Vue.js.
I have also looked at Mozilla docs, but could not adopt their example to this situation.
Really appreciate your hints to fix this.
javascript vue.js image-uploading
asked Jan 1 at 19:00
KarlomKarlom
2,15042658
add a comment |
After following on this greate tutorial to make a multi-file upload component in Vue.js, I'd like to be able to let users to preview images before uploading them. So I try to add a uri field to each photo file, in order to show them in a v-for loop like this:
<div v-for="(file, index) in files" :key="index">
<img :src="file.uri" alt="Image">
</div>
Here is the method to select files:
selectFile() {
const files = this.$refs.files.files;
this.uploadFiles = [...this.uploadFiles, ...files];
this.files = [
...this.files,
..._.map(files, file => ({
name: file.name,
type: file.type,
invalidMessage: this.validate(file)
}))
];
this.files.forEach( function (file) {
let reader = new FileReader();
file.uri = reader.readAsDataURL(file); //<-Problem here
}
);
Here is the error message:
Uncaught TypeError: Failed to execute 'readAsDataURL' on 'FileReader': parameter 1 is not of type 'Blob'.
I know there are a couple other questions on SO about this error, but none helped me, perhaps because none deals with file in a loop as I do here with Vue.js.
I have also looked at Mozilla docs, but could not adopt their example to this situation.
Really appreciate your hints to fix this.
javascript vue.js image-uploading
asked Jan 1 at 19:00
KarlomKarlom
2,15042658
After following on this greate tutorial to make a multi-file upload component in Vue.js, I'd like to be able to let users to preview images before uploading them. So I try to add a uri field to each photo file, in order to show them in a v-for loop like this:
<div v-for="(file, index) in files" :key="index">
<img :src="file.uri" alt="Image">
</div>
Here is the method to select files:
selectFile() {
const files = this.$refs.files.files;
this.uploadFiles = [...this.uploadFiles, ...files];
this.files = [
...this.files,
..._.map(files, file => ({
name: file.name,
type: file.type,
invalidMessage: this.validate(file)
}))
];
this.files.forEach( function (file) {
let reader = new FileReader();
file.uri = reader.readAsDataURL(file); //<-Problem here
}
);
Here is the error message:
Uncaught TypeError: Failed to execute 'readAsDataURL' on 'FileReader': parameter 1 is not of type 'Blob'.
I know there are a couple other questions on SO about this error, but none helped me, perhaps because none deals with file in a loop as I do here with Vue.js.
I have also looked at Mozilla docs, but could not adopt their example to this situation.
Really appreciate your hints to fix this.
javascript vue.js image-uploading
javascript vue.js image-uploading
asked Jan 1 at 19:00
KarlomKarlom
2,15042658
asked Jan 1 at 19:00
KarlomKarlom
2,15042658
edited Jan 1 at 19:37
Karlom
asked Jan 1 at 19:00
KarlomKarlom
2,15042658
asked Jan 1 at 19:00
KarlomKarlom
2,15042658
asked Jan 1 at 19:00
KarlomKarlom
2,15042658
2,15042658
add a comment |
add a comment |
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