Function drawBgImage has 7 arguments (exceeds 5 allowed). Consider refactoring.

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function drawBgImage(drawingContext, bgimage, borderWidth, offsetWidth, offsetHeight, clientWidth, clientHeight) {

Avoid deeply nested control flow statements.

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            if(value != null) break;

Avoid deeply nested control flow statements.

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            if(pv !== ret.pv) {
              this[key] = ret.rv;
              return this[key];
            }

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            if(evt.terminated && type !== 'mousemove') {
              break;
            }

Consider simplifying this complex logical expression.

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      if(key === 'fontSize'
        || key === 'fontFamily'
        || key === 'fontStyle'
        || key === 'fontVariant'
        || key === 'fontWeight') {

Consider simplifying this complex logical expression.

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      if(bgimage && bgimage.display !== 'none' || borderRadius && (this.nodeType !== 'sprite' || this.textures && this.textures.length)) {
        drawingContext.clip();
      }

Consider simplifying this complex logical expression.

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        if(typeof document !== 'undefined'
          && document.documentElement
          && document.documentElement.contains
          && target.layer
          && target.layer.canvas

Consider simplifying this complex logical expression.

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      if(layerX == null && layerY == null
        || layerX >= 0 && layerY >= 0 && layerX < width && layerY < height) {
        return true;
      }

Consider simplifying this complex logical expression.

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      if(cache || reflow || relayout || quiet || value || extra) {
        throw new Error('Cannot apply state to composit attribute.');
      }

Consider simplifying this complex logical expression.

Open

    if(!this.cacheContext || borderWidth || borderRadius || bgcolor || bgimage && bgimage.display !== 'none') {
      let [x, y, w, h, r] = [borderWidth, borderWidth,
        clientWidth, clientHeight,
        borderRadius];

Function drawEllipseBorder has 6 arguments (exceeds 5 allowed). Consider refactoring.

Open

function drawEllipseBorder(ctx, x, y, w, h, pos = 'leftTop') {

Function drawDot9Image has a Cognitive Complexity of 27 (exceeds 25 allowed). Consider refactoring.

Open

function drawDot9Image(drawingContext, image, clip9, borderWidth, offsetWidth, offsetHeight, clientWidth, clientHeight) {
  const w = image.width,
    h = image.height;

  const [top, right, bottom, left] = clip9 || [16, 16, 16, 16];

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Avoid too many return statements within this function.

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    return this[_attr].attrs;

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      return false;

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    return this[_data];

Avoid too many return statements within this function.

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  return [...val, 0, 0, 0, 0, 0, 0, 0, 0].slice(0, 8);

Avoid too many return statements within this function.

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      return this[_attr][props];

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    return true;

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            return ret.rv;

Avoid too many return statements within this function.

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        return this;