lit-image-preview v0.1.2

lit-image-preview

web-image-preview component build with lit

usage

<lit-image-preview
  visible
  showWithAnimation
  image="imgToPreview"
></lit-image-preview>

props

browser support & polyfill

To supprot legacy browser, you can replace this with a rule to explicitly include folders to compile:

include: [
  'node_modules/lit-image-preview',
  'node_modules/lit/**',
  'node_modules/lit-element/**',
  'node_modules/lit-html/**'
]

And also need to import polyfill: @webcomponents/webcomponentsjs and lit/polyfill-support.js

import "@webcomponents/webcomponentsjs";
import "lit/polyfill-support.js";

<lit-image-preview
  visible
  showWithAnimation
  image="https://zy-blog-1301055733.cos.ap-shanghai.myqcloud.com/timing%20level%201.png"
></lit-image-preview>;

For further understanding, please visit：https://lit.dev/docs/tools/requirements/

event

If you want to set a event for image preview modal hidden, you need to listen custom event lit-image-preview-mc. Here is code demo for React usage

import { useRef, useEffect } from "react"
import "lit/polyfill-support.js"
import "@webcomponents/webcomponentsjs"
import "lit-image-preview"

const ImagePreview = ({
  imgToPreview,
  onModalClick,
}: {
  imgToPreview: string
  onModalClick: () => void
}) => {
  const previewModal = useRef<HTMLDivElement>(null)

  useEffect(() => {
    if (previewModal.current) {
      previewModal.current.addEventListener(
        "lit-image-preview-mc",
        (e: CustomEvent<{ visible: boolean }>) => {
          if (e.detail.visible) onModalClick()
        },
      )
    }
  }, [onModalClick])

  return (
    <div ref={previewModal}>
      <lit-image-preview
        visible
        showWithAnimation
        image={imgToPreview}
      ></lit-image-preview>
    </div>
  )
}

And for fixing typescript eslint warning:

import type ImageModal from "lit-image-preview";

declare global {
  // eslint-disable-next-line no-unused-vars
  namespace JSX {
    // eslint-disable-next-line no-unused-vars
    interface IntrinsicElements {
      "lit-image-preview":
        | Pick<ImageModal, "image" | "showWithAnimation" | "visible">
        | HTMLElement;
    }
  }
}

const myCustomEventType: "lit-image-preview-mc" = "lit-image-preview-mc";

// "CustomEvent" comes from 'lib.dom.d.ts' (tsconfig.json)
class MyCustomEvent extends CustomEvent<MyCustomEventDetail> {
  constructor(detail: MyCustomEventDetail) {
    super(myCustomEventType, { detail });
  }
}

interface MyCustomEventDetail {
  visible: boolean;
}
declare global {
  // eslint-disable-next-line no-unused-vars
  interface HTMLElementEventMap {
    [myCustomEventType]: MyCustomEvent;
  }
}