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How to use transformIndexHtml method in Cypress

Best JavaScript code snippet using cypress

vite.config.js

Source:vite.config.js

...37      }38    },39    {40      name: 'string-transform',41      transformIndexHtml(html) {42        return html.replace('Hello', 'Transformed')43      }44    },45    {46      name: 'tags-transform',47      transformIndexHtml() {48        return [49          {50            tag: 'meta',51            attrs: { name: 'description', content: 'a vite app' }52            // default injection is head-prepend53          },54          {55            tag: 'meta',56            attrs: { name: 'keywords', content: 'es modules' },57            injectTo: 'head'58          }59        ]60      }61    },62    {63      name: 'combined-transform',64      transformIndexHtml(html) {65        return {66          html: html.replace('{{ title }}', 'Test HTML transforms'),67          tags: [68            {69              tag: 'p',70              attrs: { class: 'inject' },71              children: 'This is injected',72              injectTo: 'body'73            }74          ]75        }76      }77    },78    {79      name: 'serve-only-transform',80      transformIndexHtml(_, ctx) {81        if (ctx.server) {82          return [83            {84              tag: 'p',85              attrs: { class: 'server' },86              children: 'This is injected only during dev',87              injectTo: 'body'88            }89          ]90        }91      }92    },93    {94      name: 'build-only-transform',95      transformIndexHtml(_, ctx) {96        if (ctx.bundle) {97          return [98            {99              tag: 'p',100              attrs: { class: 'build' },101              children: 'This is injected only during build',102              injectTo: 'body'103            }104          ]105        }106      }107    },108    {109      name: 'path-conditional-transform',110      transformIndexHtml(_, ctx) {111        if (ctx.path.includes('nested')) {112          return [113            {114              tag: 'p',115              attrs: { class: 'conditional' },116              children: 'This is injected only for /nested/index.html',117              injectTo: 'body'118            }119          ]120        }121      }122    },123    {124      name: 'body-prepend-transform',125      transformIndexHtml() {126        return [127          {128            tag: 'noscript',129            children: '<!-- this is appended to body -->',130            injectTo: 'body'131          },132          {133            tag: 'noscript',134            children: '<!-- this is prepended to body -->',135            injectTo: 'body-prepend'136          }137        ]138      }139    }...

test.js

Source:test.js

1const nunjucks = require("nunjucks");2const nunjucksPlugin = require('./dist').default;3test('it can create plugin without options', () => {4    const plugin = nunjucksPlugin();5    checkPluginKeys(plugin);6});7test('it can create plugin with variables', () => {8    const plugin = nunjucksPlugin({variables: {'*': {name: 'name'}}});9    checkPluginKeys(plugin);10});11test('it can create plugin with filters and extensions', () => {12    const plugin = nunjucksPlugin({13        nunjucksEnvironment: {14            filters: {someFilter: () => 'test'},15            extensions: {someExtension: { tags: ['test'], parse: () => 'test' }}16        }17    });18    checkPluginKeys(plugin);19});20test('it can create plugin with custom environment', () => {21    const plugin = nunjucksPlugin({nunjucksEnvironment: new nunjucks.Environment()});22    checkPluginKeys(plugin);23});24test('it can transform HTML', () => {25    const name = 'John';26    const plugin = nunjucksPlugin({variables: {'*': {name: name}}});27    return expect(plugin.transformIndexHtml.transform('<p>Hello {{name}}</p>', { path: '' })).resolves.toEqual(`<p>Hello ${name}</p>`);28});29test('it can transform HTML with async filters', () => {30    const plugin = nunjucksPlugin({31        nunjucksEnvironment: {32            filters: {33                someFilter: {34                    async: true,35                    filter: (data, callback) => {36                        setTimeout(() => {37                            callback(null, data);38                        }, 100);39                    },40                },41            },42        }43    });44    return expect(plugin.transformIndexHtml.transform('<p>Hello {{ "async"|someFilter }}</p>', { path: '' })).resolves.toEqual('<p>Hello async</p>');45});46const checkPluginKeys = (plugin) => {47    expect(plugin).toHaveProperty('name');48    expect(plugin).toHaveProperty('enforce');49    expect(plugin).toHaveProperty('handleHotUpdate');50    expect(plugin).toHaveProperty('transformIndexHtml');...

vite-plugin-example.js

Source:vite-plugin-example.js

...23      //   // å¯ä»¥æ³¨åä¸é´ä»¶24      // }); // app å°±æ¯connect å®ä¾25    },26    // æ¯æ¬¡æè¯·æ±é½ä¼æ§è¡27    transformIndexHtml(html) {28      console.log("transformIndexHtml");29      return html;30    },31    // idç¡®è®¤32    resolveId(source) {33      if (source === "pluginExample") {34        console.log("resolveId", source);35        return source;36      }37      return null;38    },39    // å è½½æ¨¡åä»£ç 40    load(id) {41      if (id === "pluginExample") {...

transformUtils.js

Source:transformUtils.js

...11  return script + html;12}13exports.injectScriptToHtml = injectScriptToHtml;14// è½¬æ¢html plugin15async function transformIndexHtml(html, transforms = [], apply, isBuild = false) {16  const trans = transforms17    .map((t) => {18      return typeof t === 'function' && apply === 'post'19        ? t20        : t.apply === apply21          ? t.transform22          : undefined;23    })24    .filter(Boolean);25  let code = html;26  for (const transform of trans) {27    code = await transform({ isBuild, code });28  }29  return code;...

index.mjs

Source:index.mjs

...11      command = config.command12    },13    configureServer: configureServer(icons),14    transformIndexHtml: generateBundle(icons),15    generateBundle: transformIndexHtml(icons, command),16  }17}...

vite-plugin-index-tranform.js

Source:vite-plugin-index-tranform.js

...11  enforce: 'pre',12  // vite build is production will not invoke `transformIndexHtml`13  transform (code, id) {14    if (id.endsWith('.html')) {15      return { code: transformIndexHtml(code), map: null }16    }17  },18  transformIndexHtml19}...

index.js

Source:index.js

1const transform = require("./lib/transform") 2const useMiddleware = require("./lib/useMiddleware") 3const transformIndexHtml = require("./lib/transformIndexHtml")4const ViteDevPlugin = () => {5    return {6        name: 'vue-dev-vite-plugin',7        enforce: 'pre',8        apply: 'serve',9        transform,10        configureServer: useMiddleware,11        transformIndexHtml12    }13}...

transformIndexHtml.js

Source:transformIndexHtml.js

1const { TEMPLATE_DATA, injectAssets, injectContent } = require("vue-dev-shared")2const transformIndexHtml = (html, { server }) => {3    TEMPLATE_DATA.__HTTP_PORT__ = server.config.server.port4    return {5        html: injectContent(html, injectAssets, TEMPLATE_DATA),6        tags: []7    }8}...

Using AI Code Generation

1const path = require('path');2const { transformIndexHtml } = require('@cypress/webpack-preprocessor');3module.exports = (on, config) => {4  const options = {5    webpackOptions: require('../webpack.config'),6    watchOptions: {},7  };8  on('file:preprocessor', transformIndexHtml(options));9};10module.exports = {11  module: {12      {13        use: {14          options: {15          },16        },17      },18  },19};

Using AI Code Generation

1const { transformIndexHtml } = require('../cypress/plugins/index.js');2describe('Test', () => {3  it('should load', () => {4    cy.visit('/');5  });6});7const { transformIndexHtml } = require('@nrwl/cypress/plugins/next');8module.exports = (on, config) => {9  on('dev-server:start', (options) => {10    return startDevServer({11      webpackConfig: require('@nrwl/react/plugins/webpack').webpackConfig,12    });13  });14  on('dev-server:start', (options) => {15    return startDevServer({16      webpackConfig: require('@nrwl/next/plugins/webpack').webpackConfig,17    });18  });19  on('file:preprocessor', transformIndexHtml(config));20};

Using AI Code Generation

1cy.transformIndexHtml((html) => {2});3const { transformIndexHtml } = require('cypress-transform-index-html');4module.exports = (on, config) => {5  on('before:browser:launch', (browser = {}, args) => {6    if (browser.name === 'chrome') {7      args.push('--disable-web-security');8      return args;9    }10  });11  on('before:browser:launch', (browser = {}, args) => {12    if (browser.name === 'chrome') {13      args.push('--disable-web-security');14      return args;15    }16  });17  on('before:browser:launch', (browser = {}, args) => {18    if (browser.name === 'chrome') {19      args.push('--disable-web-security');20      return args;21    }22  });23  on('before:browser:launch', (browser = {}, args) => {24    if (browser.name === 'chrome') {25      args.push('--disable-web-security');26      return args;27    }28  });29  on('before:browser:launch', (browser = {}, args) => {30    if (browser.name === 'chrome') {31      args.push('--disable-web-security');32      return args;33    }34  });35  on('before:browser:launch', (browser = {}, args) => {36    if (browser.name === 'chrome') {37      args.push('--disable-web-security');38      return args;39    }40  });41  on('before:browser:launch', (browser = {}, args) => {42    if (browser.name === 'chrome') {43      args.push('--disable-web-security');44      return args;45    }46  });47  on('before:browser:launch', (browser = {}, args) => {48    if (browser.name === 'chrome') {49      args.push('--disable-web-security');50      return args;51    }52  });53  on('before:browser:launch', (browser = {}, args) => {54    if (browser.name === 'chrome') {55      args.push('--disable-web-security');56      return args;57    }58  });

Cypress Tutorial

Cypress is a renowned Javascript-based open-source, easy-to-use end-to-end testing framework primarily used for testing web applications. Cypress is a relatively new player in the automation testing space and has been gaining much traction lately, as evidenced by the number of Forks (2.7K) and Stars (42.1K) for the project. LambdaTest’s Cypress Tutorial covers step-by-step guides that will help you learn from the basics till you run automation tests on LambdaTest.

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