Function assert

lib/internal/console/constructor.js:477–487

(expression, ...args)

  // Defined by: https://console.spec.whatwg.org/#assert
  assert(expression, ...args) {
    if (!expression) {
      if (args.length && typeof args[0] === 'string') {
        args[0] = `Assertion failed: ${args[0]}`;
      } else {
        ArrayPrototypeUnshift(args, 'Assertion failed');
      }
      // The arguments will be formatted in warn() again
      ReflectApply(this.warn, this, args);
    }
  },

  // Defined by: https://console.spec.whatwg.org/#clear
  clear() {