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{"version":3,"file":"Ticker.mjs","sources":["../src/Ticker.ts"],"sourcesContent":["import { UPDATE_PRIORITY } from './const';\nimport { TickerListener } from './TickerListener';\n\nexport type TickerCallback<T> = (this: T, dt: number) => any;\n\n/**\n * A Ticker class that runs an update loop that other objects listen to.\n *\n * This class is composed around listeners meant for execution on the next requested animation frame.\n * Animation frames are requested only when necessary, e.g. When the ticker is started and the emitter has listeners.\n * @class\n * @memberof PIXI\n */\nexport class Ticker\n{\n /**\n * Target frames per millisecond.\n * @static\n */\n public static targetFPMS = 0.06;\n\n /** The private shared ticker instance */\n private static _shared: Ticker;\n /** The private system ticker instance */\n private static _system: Ticker;\n\n /**\n * Whether or not this ticker should invoke the method\n * {@link PIXI.Ticker#start} automatically\n * when a listener is added.\n */\n public autoStart = false;\n /**\n * Scalar time value from last frame to this frame.\n * This value is capped by setting {@link PIXI.Ticker#minFPS}\n * and is scaled with {@link PIXI.Ticker#speed}.\n * **Note:** The cap may be exceeded by scaling.\n */\n public deltaTime = 1;\n /**\n * Scaler time elapsed in milliseconds from last frame to this frame.\n * This value is capped by setting {@link PIXI.Ticker#minFPS}\n * and is scaled with {@link PIXI.Ticker#speed}.\n * **Note:** The cap may be exceeded by scaling.\n * If the platform supports DOMHighResTimeStamp,\n * this value will have a precision of 1 µs.\n * Defaults to target frame time\n * @default 16.66\n */\n public deltaMS: number;\n /**\n * Time elapsed in milliseconds from last frame to this frame.\n * Opposed to what the scalar {@link PIXI.Ticker#deltaTime}\n * is based, this value is neither capped nor scaled.\n * If the platform supports DOMHighResTimeStamp,\n * this value will have a precision of 1 µs.\n * Defaults to target frame time\n * @default 16.66\n */\n public elapsedMS: number;\n /**\n * The last time {@link PIXI.Ticker#update} was invoked.\n * This value is also reset internally outside of invoking\n * update, but only when a new animation frame is requested.\n * If the platform supports DOMHighResTimeStamp,\n * this value will have a precision of 1 µs.\n */\n public lastTime = -1;\n /**\n * Factor of current {@link PIXI.Ticker#deltaTime}.\n * @example\n * // Scales ticker.deltaTime to what would be\n * // the equivalent of approximately 120 FPS\n * ticker.speed = 2;\n */\n public speed = 1;\n /**\n * Whether or not this ticker has been started.\n * `true` if {@link PIXI.Ticker#start} has been called.\n * `false` if {@link PIXI.Ticker#stop} has been called.\n * While `false`, this value may change to `true` in the\n * event of {@link PIXI.Ticker#autoStart} being `true`\n * and a listener is added.\n */\n public started = false;\n\n /** The first listener. All new listeners added are chained on this. */\n private _head: TickerListener;\n /** Internal current frame request ID */\n private _requestId: number = null;\n /**\n * Internal value managed by minFPS property setter and getter.\n * This is the maximum allowed milliseconds between updates.\n */\n private _maxElapsedMS = 100;\n /**\n * Internal value managed by minFPS property setter and getter.\n * This is the minimum allowed milliseconds between updates.\n */\n private _minElapsedMS = 0;\n /** If enabled, deleting is disabled.*/\n private _protected = false;\n /** The last time keyframe was executed. Maintains a relatively fixed interval with the previous value. */\n private _lastFrame = -1;\n /**\n * Internal tick method bound to ticker instance.\n * This is because in early 2015, Funct
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