Method apply

index.js:163–310

* * @param {Compiler} compiler * @returns {void}

(compiler)

   * @returns {void}
   */
  apply(compiler) {
    this.logger = compiler.getInfrastructureLogger("HtmlWebpackPlugin");

    const options = this.options;

    options.template = this.getTemplatePath(
      this.options.template,
      compiler.context,
    );

    // Assert correct option spelling
    if (
      options.scriptLoading !== "defer" &&
      options.scriptLoading !== "blocking" &&
      options.scriptLoading !== "module" &&
      options.scriptLoading !== "systemjs-module"
    ) {
      /** @type {Logger} */
      (this.logger).error(
        'The "scriptLoading" option need to be set to "defer", "blocking" or "module" or "systemjs-module"',
      );
    }

    if (
      options.inject !== true &&
      options.inject !== false &&
      options.inject !== "head" &&
      options.inject !== "body"
    ) {
      /** @type {Logger} */
      (this.logger).error(
        'The `inject` option needs to be set to true, false, "head" or "body',
      );
    }

    if (
      this.options.templateParameters !== false &&
      typeof this.options.templateParameters !== "function" &&
      typeof this.options.templateParameters !== "object"
    ) {
      /** @type {Logger} */
      (this.logger).error(
        "The `templateParameters` has to be either a function or an object or false",
      );
    }

    // Default metaOptions if no template is provided
    if (
      !this.userOptions.template &&
      options.templateContent === false &&
      options.meta
    ) {
      options.meta = Object.assign(
        {},
        options.meta,
        {
          // TODO remove in the next major release
          // From https://developer.mozilla.org/en-US/docs/Mozilla/Mobile/Viewport_meta_tag