cypress-set-device-pixel-ratio/dist/index.js

A Cypress custom command to set window.devicePixelRatio

"use strict";
var __assign = (this && this.__assign) || function () {
    __assign = Object.assign || function(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
                t[p] = s[p];
        }
        return t;
    };
    return __assign.apply(this, arguments);
};
Object.defineProperty(exports, "__esModule", { value: true });
require("cypress-wait-until");
;
Cypress.Commands.add('setDevicePixelRatio', function (pixelRatio, options) {
    if (options === void 0) { options = {
        mobile: false,
        width: 0,
        height: 0,
    }; }
    var overrideDeviceScaleFactor = function (scaleFactor) { return cy.wrap(Cypress.automation('remote:debugger:protocol', {
        command: 'Emulation.setDeviceMetricsOverride',
        params: __assign({ deviceScaleFactor: scaleFactor }, options),
    })); };
    var initialPixelRatio = window.devicePixelRatio;
    // Set to an unlikely value to ensure that the override is working
    var calibrationPixelRatio = 0.1;
    return overrideDeviceScaleFactor(calibrationPixelRatio)
        .then(function () { return cy.waitUntil(function () { return cy.wrap(window.devicePixelRatio.toFixed(3)).should('not.eq', initialPixelRatio.toFixed(3)); }); })
        .then(function () { return overrideDeviceScaleFactor(pixelRatio / window.devicePixelRatio * calibrationPixelRatio); })
        .then(function () { return cy.waitUntil(function () { return cy.wrap(window.devicePixelRatio.toFixed(3)).should('eq', pixelRatio.toFixed(3)); }, { interval: 10 }); });
});