@dash0/sdk-web/dist/modules/instrumentations/errors/timers.js

Dash0's Web SDK to collect telemetry from end-users' web browsers

import { vars } from "../../vars";
import { isRunningZoneJs } from "../../utils/timers";
import { warn, win } from "../../utils";
import { ignoreNextOnErrorEvent } from "./unhandled-error";
export function startTimerInstrumentation() {
    if (vars.wrapTimers) {
        if (isRunningZoneJs) {
            warn("We discovered a usage of Zone.js. In order to avoid any incompatibility issues timer wrapping is not going to be enabled.");
            return;
        }
        wrapTimer("setTimeout");
        wrapTimer("setInterval");
    }
}
function wrapTimer(name) {
    const original = win?.[name];
    if (typeof original !== "function") {
        // cannot wrap because fn is not a function – should actually never happen
        return;
    }
    win[name] = function wrappedTimerSetter(fn) {
        // non-deopt arguments copy
        const args = new Array(arguments.length);
        for (let i = 0; i < arguments.length; i++) {
            args[i] = arguments[i];
        }
        args[0] = wrap(fn);
        return original.apply(this, args);
    };
}
function wrap(fn) {
    if (typeof fn !== "function") {
        // cannot wrap because fn is not a function
        return fn;
    }
    return function wrappedTimerHandler() {
        try {
            return fn.apply(this, arguments);
        }
        catch (e) {
            reportError(e);
            ignoreNextOnErrorEvent();
            throw e;
        }
    };
}