Method add

snowpack/src/commands/dev.ts:54–60

(key: string, _value: string | string[])

  readonly keyToValue = new Map<string, string[]>();
  readonly valueToKey = new Map<string, string>();
  add(key: string, _value: string | string[]) {
    const value = Array.isArray(_value) ? _value : [_value];
    this.keyToValue.set(key, value);
    for (const val of value) {
      this.valueToKey.set(val, key);
    }
  }
  delete(key: string) {
    const value = this.value(key);
    this.keyToValue.delete(key);