Editing Images Before Uploading in Vue JS Project
Lakh Bawa
Posted on December 26, 2020
Hello Everyone, hope you are doing well and staying safe,
Today I will be sharing the small coding snippet that I created today to allow the users to edit/crop/rotate images before uploading them to the website.
I am using Vuetify with Material Icons in my project and assume many of you use that as well as it is the one that's most popular.
The most interesting point in this tutorial is, Edited image will be simply HTML File Object, unlike other solutions available out there on the internet which returns bash string or blob, etc, where you have to modify your backend logic.
so in our case, it would be fully compatible with the existing backend API uploading logic as it returns Default File Object.
First Install the dependency required to edit the image.
Installation
npm install --save vue-cropperjs
Secondly, create a component named AvatarUpload in the components folder or somewhere else where you feel comfortable.
In my case, its located at /components/Utils/AvatarUpload in my nuxtjs based project
<template>
<div>
<div class="content">
<v-dialog v-model="isAvatarUploadDialogOpen" persistent max-width="600">
<v-card>
<v-card-title class="headline"></v-card-title>
<v-card-text>
<v-row no-gutters>
<v-col class="">
<section class="cropper-area">
<div class="img-cropper">
<vue-cropper
ref="cropper"
:initial-aspect-ratio="1"
:src="imgSrc"
preview=".preview"
/>
</div>
<div class="actions mt-2">
<v-btn class="ma-1" small dark color="grey darken-3" @click.prevent="zoom(0.2)">
<v-icon> mdi-magnify-plus-outline</v-icon>
</v-btn>
<v-btn class="ma-1" small dark color="grey darken-3" @click.prevent="zoom(-0.2)">
<v-icon> mdi-magnify-minus-outline</v-icon>
</v-btn>
<v-btn class="ma-1" small dark color="grey darken-3" @click.prevent="rotate(90)">
<v-icon href="#">
mdi-axis-x-rotate-clockwise
</v-icon>
</v-btn>
<v-btn class="ma-1" small dark color="grey darken-3" @click.prevent="rotate(-90)">
<v-icon>
mdi-axis-x-rotate-counterclockwise
</v-icon>
</v-btn>
<v-btn class="ma-1" small dark color="grey darken-3" @click.prevent="move(10, 0)">
<v-icon>
mdi-arrow-left
</v-icon>
</v-btn>
<v-btn class="ma-1" small dark color="grey darken-3" @click.prevent="move(-10, 0)">
<v-icon>
mdi-arrow-right
</v-icon>
</v-btn>
<v-btn class="ma-1" small dark color="grey darken-3" @click.prevent="move(0, 10)">
<v-icon>
mdi-arrow-up
</v-icon>
</v-btn>
<v-btn class="ma-1" small dark color="grey darken-3" @click.prevent="move(0, -10)">
<v-icon>
mdi-arrow-down
</v-icon>
</v-btn>
<!-- <v-btn class="ma-1" small dark color="grey darken-3" @click.prevent="cropImage">-->
<!-- <v-icon > mdi-crop</v-icon>-->
<!-- </v-btn>-->
<v-btn class="ma-1" small dark color="grey darken-3">
<v-icon @click.prevent="reset"> mdi-lock-reset</v-icon>
</v-btn>
</div>
</section>
<div class="text-right">
<v-btn small dark color="grey darken-3 mt-3" @click.prevent="submitImage">
<v-icon> mdi-send</v-icon>
Submit
</v-btn>
</div>
<!-- <div class="mt-4">-->
<!-- <v-btn small dark color="grey darken-3" @click.prevent="showFileChooser">-->
<!-- <v-icon>-->
<!-- mdi-upload-->
<!-- </v-icon>-->
<!-- Upload Image-->
<!-- </v-btn>-->
<!-- </div>-->
<!-- <textarea v-model="data" /> -->
</v-col>
<!-- <v-col cols="12" sm="6">-->
<!-- <section class="preview-area">-->
<!-- <!– <p>Preview</p>–>-->
<!-- <div class="preview"/>-->
<!-- <div class="cropped-image">-->
<!-- <img v-if="cropImg" :src="cropImg" alt="Cropped Image"/>-->
<!-- <div v-else class="crop-placeholder"/>-->
<!-- </div>-->
<!-- </section>-->
<!-- </v-col>-->
</v-row>
</v-card-text>
</v-card>
</v-dialog>
</div>
</div>
</template>
<script>
import VueCropper from "vue-cropperjs";
import "cropperjs/dist/cropper.css";
export default {
components: {
VueCropper,
},
props: {
// eslint-disable-next-line vue/require-prop-types
image: {
required: true
},
},
data() {
return {
imgSrc: "/assets/images/berserk.jpg",
cropImg: "",
data: null,
filename: "",
mimeType: "",
isAvatarUploadDialogOpen: false,
};
},
watch: {
image(value) {
this.initialImageSetUp(value)
}
},
mounted() {
this.initialImageSetUp(this.image)
},
methods: {
initialImageSetUp(value) {
const self = this
if (!value) {
this.cropImg = ""
this.$emit('close', true)
return;
}
this.isAvatarUploadDialogOpen = true
self.filename = value.name
self.mimeType = value.type
self.setImage(value)
},
async dataURLToFile(imageString, filename, mimeType) {
const res = await fetch(imageString);
const blob = await res.blob();
return new File([blob], filename, { type: mimeType });
},
async submitImage() {
await this.cropImage();
const imageFileResponse = await this.dataURLToFile(this.cropImg, this.filename, this.mimeType)
this.$emit('done', imageFileResponse)
this.isAvatarUploadDialogOpen = false
},
cropImage() {
// get image data for post processing, e.g. upload or setting image src
this.cropImg = this.$refs.cropper.getCroppedCanvas().toDataURL();
},
// flipX() {
// const dom = this.$refs.flipX;
// let scale = dom.getAttribute("data-scale");
// scale = scale ? -scale : -1;
// this.$refs.cropper.scaleX(scale);
// dom.setAttribute("data-scale", scale);
// },
// flipY() {
// const dom = this.$refs.flipY;
// let scale = dom.getAttribute("data-scale");
// scale = scale ? -scale : -1;
// this.$refs.cropper.scaleY(scale);
// dom.setAttribute("data-scale", scale);
// },
getCropBoxData() {
this.data = JSON.stringify(this.$refs.cropper.getCropBoxData(), null, 4);
},
getData() {
this.data = JSON.stringify(this.$refs.cropper.getData(), null, 4);
},
move(offsetX, offsetY) {
this.$refs.cropper.move(offsetX, offsetY);
},
reset() {
this.$refs.cropper.reset();
},
rotate(deg) {
this.$refs.cropper.rotate(deg);
},
setCropBoxData() {
if (!this.data) return;
this.$refs.cropper.setCropBoxData(JSON.parse(this.data));
},
setData() {
if (!this.data) return;
this.$refs.cropper.setData(JSON.parse(this.data));
},
setImage(file) {
if (!file.type.includes("image/")) {
alert("Please select an image file");
return;
}
if (typeof FileReader === "function") {
const reader = new FileReader();
reader.onload = (event) => {
this.imgSrc = event.target.result;
// rebuild cropperjs with the updated source
this.$refs.cropper.replace(event.target.result);
};
reader.readAsDataURL(file);
} else {
alert("Sorry, FileReader API not supported");
}
},
showFileChooser() {
this.$refs.input.click();
},
zoom(percent) {
this.$refs.cropper.relativeZoom(percent);
},
},
};
</script>
<style>
input[type="file"] {
display: none;
}
.cropped-image {
padding: 0 .8rem;
}
.img-cropper {
max-height: 400px;
overflow: hidden;
}
</style>
Using AvatarUpload Component
In any component where you want to implement the ImageEditing Features. use it like this
<template>
<div>
<v-container>
<v-file-input
v-model="avatarImage"
label="File input"
></v-file-input>
<AvatarUpload :image="avatarImage" @done="(image) => form.image=image"/>
</v-container>
</div>
</template>
<script>
import AvatarUpload from "@/components/Utils/AvatarUpload";
export default {
components: {AvatarUpload},
data() {
return {
avatarImage: null,
form: {
image: null
}
}
},
}
</script>
<style scoped></style>
💖 💪 🙅 🚩
Lakh Bawa
Posted on December 26, 2020
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