@capgo/capacitor-flash/dist/esm/web.js

Switch the Flashlight / Torch of your device.

import { WebPlugin } from '@capacitor/core';
export class CapacitorFlashWeb extends WebPlugin {
    constructor() {
        super(...arguments);
        this.stream = null;
        this.track = null;
        this.torchOn = false;
    }
    async isAvailable() {
        var _a, _b;
        try {
            if (!((_a = navigator.mediaDevices) === null || _a === void 0 ? void 0 : _a.getUserMedia)) {
                return { value: false };
            }
            const stream = await navigator.mediaDevices.getUserMedia({
                video: { facingMode: 'environment' },
            });
            const track = stream.getVideoTracks()[0];
            const capabilities = (_b = track.getCapabilities) === null || _b === void 0 ? void 0 : _b.call(track);
            const hasTorch = (capabilities === null || capabilities === void 0 ? void 0 : capabilities.torch) === true;
            // Stop the test stream
            track.stop();
            return { value: hasTorch };
        }
        catch (_c) {
            return { value: false };
        }
    }
    async switchOn(_options) {
        var _a;
        try {
            // If we already have a stream with torch on, just return
            if (this.stream && this.torchOn) {
                return;
            }
            // Get camera stream if we don't have one
            if (!this.stream) {
                this.stream = await navigator.mediaDevices.getUserMedia({
                    video: { facingMode: 'environment' },
                });
                this.track = this.stream.getVideoTracks()[0];
            }
            // Apply torch constraint
            await ((_a = this.track) === null || _a === void 0 ? void 0 : _a.applyConstraints({
                advanced: [{ torch: true }],
            }));
            this.torchOn = true;
        }
        catch (e) {
            throw new Error(`Failed to switch on torch: ${e}`);
        }
    }
    async switchOff() {
        try {
            if (this.track) {
                // Turn off torch by stopping the track
                this.track.stop();
                this.track = null;
            }
            if (this.stream) {
                this.stream = null;
            }
            this.torchOn = false;
        }
        catch (e) {
            throw new Error(`Failed to switch off torch: ${e}`);
        }
    }
    async isSwitchedOn() {
        return { value: this.torchOn };
    }
    async toggle() {
        if (this.torchOn) {
            await this.switchOff();
        }
        else {
            await this.switchOn({});
        }
        return { value: this.torchOn };
    }
    async getPluginVersion() {
        return { version: 'web' };
    }
}
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