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_performPreflightComputations() — react Function Reference

Architecture documentation for the _performPreflightComputations() function in ReactMeasuresView.js from the react codebase.

Function javascript BabelCompiler Validation called by 1

Entity Profile

Dependency Diagram

graph TD
  2b4fe3d4_cdf8_ce6f_170c_b5212ee38e40["_performPreflightComputations()"]
  ef3af242_6989_01f2_141b_b5ae3fce4bc5["ReactMeasuresView"]
  2b4fe3d4_cdf8_ce6f_170c_b5212ee38e40 -->|defined in| ef3af242_6989_01f2_141b_b5ae3fce4bc5
  832c0ddc_1576_8235_3ea4_b4ccdd46a619["constructor()"]
  832c0ddc_1576_8235_3ea4_b4ccdd46a619 -->|calls| 2b4fe3d4_cdf8_ce6f_170c_b5212ee38e40
  style 2b4fe3d4_cdf8_ce6f_170c_b5212ee38e40 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/react-devtools-timeline/src/content-views/ReactMeasuresView.js lines 54–72

  _performPreflightComputations() {
    this._lanesToRender = [];

    // eslint-disable-next-line no-for-of-loops/no-for-of-loops
    for (const [lane, measuresForLane] of this._profilerData
      .laneToReactMeasureMap) {
      // Only show lanes with measures
      if (measuresForLane.length > 0) {
        this._lanesToRender.push(lane);
      }
    }

    this._intrinsicSize = {
      width: this._profilerData.duration,
      height: this._lanesToRender.length * REACT_LANE_HEIGHT,
      hideScrollBarIfLessThanHeight: REACT_LANE_HEIGHT,
      maxInitialHeight: MAX_ROWS_TO_SHOW_INITIALLY * REACT_LANE_HEIGHT,
    };
  }

Domain

Subdomains

Defined In

Called By

Source

Frequently Asked Questions

What does _performPreflightComputations() do?
_performPreflightComputations() is a function in the react codebase, defined in packages/react-devtools-timeline/src/content-views/ReactMeasuresView.js.
Where is _performPreflightComputations() defined?
_performPreflightComputations() is defined in packages/react-devtools-timeline/src/content-views/ReactMeasuresView.js at line 54.
What calls _performPreflightComputations()?
_performPreflightComputations() is called by 1 function(s): constructor.

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