Method constructor

deps/v8/tools/zone-stats/trace-file-reader.js:11–20

()

defineCustomElement('trace-file-reader', (templateText) =>
 class TraceFileReader extends HTMLElement {
  constructor() {
    super();
    const shadowRoot = this.attachShadow({mode: 'open'});
    shadowRoot.innerHTML = templateText;
    this.addEventListener('click', e => this.handleClick(e));
    this.addEventListener('dragover', e => this.handleDragOver(e));
    this.addEventListener('drop', e => this.handleChange(e));
    this.$('#file').addEventListener('change', e => this.handleChange(e));
    this.$('#fileReader').addEventListener('keydown', e => this.handleKeyEvent(e));
  }

  $(id) {
    return this.shadowRoot.querySelector(id);