Method move

src/js/tether.js:570–747

(pos)

  // THE ISSUE
  move(pos) {
    if (isUndefined(this.element.parentNode)) {
      return;
    }

    const same = {};

    for (let type in pos) {
      same[type] = {};

      for (let key in pos[type]) {
        let found = false;

        for (let i = 0; i < this.history.length; ++i) {
          const point = this.history[i];
          if (
            !isUndefined(point[type]) &&
            !within(point[type][key], pos[type][key])
          ) {
            found = true;
            break;
          }
        }

        if (!found) {
          same[type][key] = true;
        }
      }
    }

    let css = { top: '', left: '', right: '', bottom: '' };

    const transcribe = (_same, _pos) => {
      const hasOptimizations = !isUndefined(this.options.optimizations);
      const gpu = hasOptimizations ? this.options.optimizations.gpu : null;
      if (gpu !== false) {
        let yPos, xPos;
        if (_same.top) {
          css.top = 0;
          yPos = _pos.top;
        } else {
          css.bottom = 0;
          yPos = -_pos.bottom;
        }

        if (_same.left) {
          css.left = 0;
          xPos = _pos.left;
        } else {
          css.right = 0;
          xPos = -_pos.right;
        }

        if (isNumber(window.devicePixelRatio) && devicePixelRatio % 1 === 0) {
          xPos = Math.round(xPos * devicePixelRatio) / devicePixelRatio;
          yPos = Math.round(yPos * devicePixelRatio) / devicePixelRatio;
        }