Method margin

src/gridstack.ts:1764–1777

* Updates the margins which will set all 4 sides at once - see `GridStackOptions.margin` for format options. * Supports CSS string format of 1, 2, or 4 values or a single number. * * @param value margin value - can be: * - Single number: `10` (applies to all sides) * - Two values:

(value: numberOrString)

   * grid.margin('5px 10px 15px 20px'); // Different for each side
   */
  public margin(value: numberOrString): GridStack {
    const isMultiValue = (typeof value === 'string' && value.split(' ').length > 1);
    // check if we can skip... won't check if multi values (too much hassle)
    if (!isMultiValue) {
      const data = Utils.parseHeight(value);
      if (this.opts.marginUnit === data.unit && this.opts.margin === data.h) return;
    }
    // re-use existing margin handling
    this.opts.margin = value;
    this.opts.marginTop = this.opts.marginBottom = this.opts.marginLeft = this.opts.marginRight = undefined;
    this._initMargin();

    return this;
  }

  /**
   * Returns the current margin value as a number (undefined if the 4 sides don't match).