In JavaScript, import "<width in pixel>x<height in pixel>.png"
import placeholder from "200x300.png";
const element = document.createElement("img");
element.src = placeholder;
document.body.appendChild(element);
This will generate image with specific width and height automatically.
npm i --save-dev webpack-image-placeholder-plugin
const ImagePlaceholderPlugin = require("webpack-image-placeholder-plugin");
module.exports = {
// ...
plugins: [new ImagePlaceholderPlugin()]
};