marko-amp/components/amp-img/amp-img.js

Marko taglib for Accelerated Mobile Pages custom tags

'use strict';

const assert = require('assert');
const path = require('path');

const tagData = require(path.resolve(__dirname, '../../marko.json')).tags[
  'amp-img'
];

function renderAmpImg(input = {}, dontClose) {
  const attributes = [];
  assert.ok(
    input.src || input.srcset,
    `Either src or srcset attribute is required for AMP-IMG tag`,
  );
  // getting attributes names
  for (const attr in tagData.attributes) {
    if (attr in input) {
      if (typeof input[attr] === 'boolean') attributes.push(attr);
      else attributes.push(`${attr}="${input[attr]}"`);
    }
  }
  const res = [`<amp-img ${attributes.join(' ')}>`];
  if (!dontClose) res.push('</amp-img>');
  return res.join('');
}
module.exports = renderAmpImg;