govuk-frontend/dist/govuk/components/radios/radios.mjs.map

GOV.UK Frontend contains the code you need to start building a user interface for government platforms and services.

{"version":3,"file":"radios.mjs","sources":["../../../../src/govuk/components/radios/radios.mjs"],"sourcesContent":["import { ElementError } from '../../errors/index.mjs'\nimport { GOVUKFrontendComponent } from '../../govuk-frontend-component.mjs'\n\n/**\n * Radios component\n *\n * @preserve\n */\nexport class Radios extends GOVUKFrontendComponent {\n  /** @private */\n  $inputs\n\n  /**\n   * Radios can be associated with a 'conditionally revealed' content block –\n   * for example, a radio for 'Phone' could reveal an additional form field for\n   * the user to enter their phone number.\n   *\n   * These associations are made using a `data-aria-controls` attribute, which\n   * is promoted to an aria-controls attribute during initialisation.\n   *\n   * We also need to restore the state of any conditional reveals on the page\n   * (for example if the user has navigated back), and set up event handlers to\n   * keep the reveal in sync with the radio state.\n   *\n   * @param {Element | null} $root - HTML element to use for radios\n   */\n  constructor($root) {\n    super($root)\n\n    const $inputs = this.$root.querySelectorAll('input[type=\"radio\"]')\n    if (!$inputs.length) {\n      throw new ElementError({\n        component: Radios,\n        identifier: 'Form inputs (`<input type=\"radio\">`)'\n      })\n    }\n\n    this.$inputs = $inputs\n\n    this.$inputs.forEach(($input) => {\n      const targetId = $input.getAttribute('data-aria-controls')\n\n      // Skip radios without data-aria-controls attributes\n      if (!targetId) {\n        return\n      }\n\n      // Throw if target conditional element does not exist.\n      if (!document.getElementById(targetId)) {\n        throw new ElementError({\n          component: Radios,\n          identifier: `Conditional reveal (\\`id=\"${targetId}\"\\`)`\n        })\n      }\n\n      // Promote the data-aria-controls attribute to a aria-controls attribute\n      // so that the relationship is exposed in the AOM\n      $input.setAttribute('aria-controls', targetId)\n      $input.removeAttribute('data-aria-controls')\n    })\n\n    // When the page is restored after navigating 'back' in some browsers the\n    // state of form controls is not restored until *after* the DOMContentLoaded\n    // event is fired, so we need to sync after the pageshow event.\n    window.addEventListener('pageshow', () => this.syncAllConditionalReveals())\n\n    // Although we've set up handlers to sync state on the pageshow event, init\n    // could be called after those events have fired, for example if they are\n    // added to the page dynamically, so sync now too.\n    this.syncAllConditionalReveals()\n\n    // Handle events\n    this.$root.addEventListener('click', (event) => this.handleClick(event))\n  }\n\n  /**\n   * Sync the conditional reveal states for all radio buttons in this component.\n   *\n   * @private\n   */\n  syncAllConditionalReveals() {\n    this.$inputs.forEach(($input) =>\n      this.syncConditionalRevealWithInputState($input)\n    )\n  }\n\n  /**\n   * Sync conditional reveal with the input state\n   *\n   * Synchronise the visibility of the conditional reveal, and its accessible\n   * state, with the input's checked state.\n   *\n   * @private\n   * @param {HTMLInputElement} $input - Radio input\n   */\n  syncConditionalRevealWithInputState($input) {\n    const targetId = $input.getAttribute('aria-controls')\n    if (!targetId) {\n      return\n    }\n\n    const $target = document.getElementById(targetId)\n    if ($target?.classList.contains('govuk-radios__conditional')) {\n      const inputIsChecked = $input.checked\n\n      $input.setAttribute('aria-expanded', inputIsChecked.toString())\n      $target.classList.toggle(\n        'govuk-radios__conditional--hidden',\n        !inputIsChecked\n      )\n    }\n  }\n\n  /**\n   * Click event handler\n   *\n   * Handle a click within the component root – if the click occurred on a radio, sync\n   * the state of the conditional reveal for all radio buttons in the same form\n   * with the same name (because checking one radio could have un-checked a\n   * radio under the root of another Radio component)\n   *\n   * @private\n   * @param {MouseEvent} event - Click event\n   */\n  handleClick(event) {\n    const $clickedInput = event.target\n\n    // Ignore clicks on things that aren't radio buttons\n    if (\n      !($clickedInput instanceof HTMLInputElement) ||\n      $clickedInput.type !== 'radio'\n    ) {\n      return\n    }\n\n    // We only need to consider radios with conditional reveals, which will have\n    // aria-controls attributes.\n    const $allInputs = document.querySelectorAll(\n      'input[type=\"radio\"][aria-controls]'\n    )\n\n    const $clickedInputForm = $clickedInput.form\n    const $clickedInputName = $clickedInput.name\n\n    $allInputs.forEach(($input) => {\n      const hasSameFormOwner = $input.form === $clickedInputForm\n      const hasSameName = $input.name === $clickedInputName\n\n      if (hasSameName && hasSameFormOwner) {\n        this.syncConditionalRevealWithInputState($input)\n      }\n    })\n  }\n\n  /**\n   * Name for the component used when initialising using data-module attributes.\n   */\n  static moduleName = 'govuk-radios'\n}\n"],"names":["Radios","GOVUKFrontendComponent","constructor","$root","$inputs","querySelectorAll","length","ElementError","component","identifier","forEach","$input","targetId","getAttribute","document","getElementById","setAttribute","removeAttribute","window","addEventListener","syncAllConditionalReveals","event","handleClick","syncConditionalRevealWithInputState","$target","classList","contains","inputIsChecked","checked","toString","toggle","$clickedInput","target","HTMLInputElement","type","$allInputs","$clickedInputForm","form","$clickedInputName","name","hasSameFormOwner","hasSameName","moduleName"],"mappings":";;;AAGA;AACA;AACA;AACA;AACA;AACO,MAAMA,MAAM,SAASC,sBAAsB,CAAC;AAIjD;AACF;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;EACEC,WAAWA,CAACC,KAAK,EAAE;IACjB,KAAK,CAACA,KAAK,CAAC,CAAA;AAAA,IAAA,IAAA,CAjBdC,OAAO,GAAA,KAAA,CAAA,CAAA;IAmBL,MAAMA,OAAO,GAAG,IAAI,CAACD,KAAK,CAACE,gBAAgB,CAAC,qBAAqB,CAAC,CAAA;AAClE,IAAA,IAAI,CAACD,OAAO,CAACE,MAAM,EAAE;MACnB,MAAM,IAAIC,YAAY,CAAC;AACrBC,QAAAA,SAAS,EAAER,MAAM;AACjBS,QAAAA,UAAU,EAAE,sCAAA;AACd,OAAC,CAAC,CAAA;AACJ,KAAA;IAEA,IAAI,CAACL,OAAO,GAAGA,OAAO,CAAA;AAEtB,IAAA,IAAI,CAACA,OAAO,CAACM,OAAO,CAAEC,MAAM,IAAK;AAC/B,MAAA,MAAMC,QAAQ,GAAGD,MAAM,CAACE,YAAY,CAAC,oBAAoB,CAAC,CAAA;MAG1D,IAAI,CAACD,QAAQ,EAAE;AACb,QAAA,OAAA;AACF,OAAA;AAGA,MAAA,IAAI,CAACE,QAAQ,CAACC,cAAc,CAACH,QAAQ,CAAC,EAAE;QACtC,MAAM,IAAIL,YAAY,CAAC;AACrBC,UAAAA,SAAS,EAAER,MAAM;UACjBS,UAAU,EAAE,6BAA6BG,QAAQ,CAAA,IAAA,CAAA;AACnD,SAAC,CAAC,CAAA;AACJ,OAAA;AAIAD,MAAAA,MAAM,CAACK,YAAY,CAAC,eAAe,EAAEJ,QAAQ,CAAC,CAAA;AAC9CD,MAAAA,MAAM,CAACM,eAAe,CAAC,oBAAoB,CAAC,CAAA;AAC9C,KAAC,CAAC,CAAA;IAKFC,MAAM,CAACC,gBAAgB,CAAC,UAAU,EAAE,MAAM,IAAI,CAACC,yBAAyB,EAAE,CAAC,CAAA;IAK3E,IAAI,CAACA,yBAAyB,EAAE,CAAA;AAGhC,IAAA,IAAI,CAACjB,KAAK,CAACgB,gBAAgB,CAAC,OAAO,EAAGE,KAAK,IAAK,IAAI,CAACC,WAAW,CAACD,KAAK,CAAC,CAAC,CAAA;AAC1E,GAAA;AAOAD,EAAAA,yBAAyBA,GAAG;AAC1B,IAAA,IAAI,CAAChB,OAAO,CAACM,OAAO,CAAEC,MAAM,IAC1B,IAAI,CAACY,mCAAmC,CAACZ,MAAM,CACjD,CAAC,CAAA;AACH,GAAA;EAWAY,mCAAmCA,CAACZ,MAAM,EAAE;AAC1C,IAAA,MAAMC,QAAQ,GAAGD,MAAM,CAACE,YAAY,CAAC,eAAe,CAAC,CAAA;IACrD,IAAI,CAACD,QAAQ,EAAE;AACb,MAAA,OAAA;AACF,KAAA;AAEA,IAAA,MAAMY,OAAO,GAAGV,QAAQ,CAACC,cAAc,CAACH,QAAQ,CAAC,CAAA;IACjD,IAAIY,OAAO,IAAPA,IAAAA,IAAAA,OAAO,CAAEC,SAAS,CAACC,QAAQ,CAAC,2BAA2B,CAAC,EAAE;AAC5D,MAAA,MAAMC,cAAc,GAAGhB,MAAM,CAACiB,OAAO,CAAA;MAErCjB,MAAM,CAACK,YAAY,CAAC,eAAe,EAAEW,cAAc,CAACE,QAAQ,EAAE,CAAC,CAAA;MAC/DL,OAAO,CAACC,SAAS,CAACK,MAAM,CACtB,mCAAmC,EACnC,CAACH,cACH,CAAC,CAAA;AACH,KAAA;AACF,GAAA;EAaAL,WAAWA,CAACD,KAAK,EAAE;AACjB,IAAA,MAAMU,aAAa,GAAGV,KAAK,CAACW,MAAM,CAAA;IAGlC,IACE,EAAED,aAAa,YAAYE,gBAAgB,CAAC,IAC5CF,aAAa,CAACG,IAAI,KAAK,OAAO,EAC9B;AACA,MAAA,OAAA;AACF,KAAA;AAIA,IAAA,MAAMC,UAAU,GAAGrB,QAAQ,CAACT,gBAAgB,CAC1C,oCACF,CAAC,CAAA;AAED,IAAA,MAAM+B,iBAAiB,GAAGL,aAAa,CAACM,IAAI,CAAA;AAC5C,IAAA,MAAMC,iBAAiB,GAAGP,aAAa,CAACQ,IAAI,CAAA;AAE5CJ,IAAAA,UAAU,CAACzB,OAAO,CAAEC,MAAM,IAAK;AAC7B,MAAA,MAAM6B,gBAAgB,GAAG7B,MAAM,CAAC0B,IAAI,KAAKD,iBAAiB,CAAA;AAC1D,MAAA,MAAMK,WAAW,GAAG9B,MAAM,CAAC4B,IAAI,KAAKD,iBAAiB,CAAA;MAErD,IAAIG,WAAW,IAAID,gBAAgB,EAAE;AACnC,QAAA,IAAI,CAACjB,mCAAmC,CAACZ,MAAM,CAAC,CAAA;AAClD,OAAA;AACF,KAAC,CAAC,CAAA;AACJ,GAAA;AAMF,CAAA;AAtJaX,MAAM,CAqJV0C,UAAU,GAAG,cAAc;;;;"}