Method $$trigger

packages/miniprogram-render/src/event/event-target.js:215–278

* 触发节点事件

(eventName, {
        event, args = [], isCapture, isTarget
    } = {})

     * 触发节点事件
     */
    $$trigger(eventName, {
        event, args = [], isCapture, isTarget
    } = {}) {
        eventName = eventName.toLowerCase()
        const handlers = this.$_getHandlers(eventName, isCapture)
        const onEventName = `on${eventName}`

        if (!event) {
            const document = this.ownerDocument
            const window = document ? document.defaultView : null
            event = new Event({
                timeStamp: window ? window.performance.now() : Date.now(),
                touches: [],
                changedTouches: [],
                name: eventName,
                target: this,
                eventPhase: Event.AT_TARGET,
            })
        }

        if ((!isCapture || !isTarget) && typeof this[onEventName] === 'function') {
            // 触发 onXXX 绑定的事件
            if (event && event.$$immediateStop) return
            try {
                event.returnValue = this[onEventName].call(this || null, event, ...args)
            } catch (err) {
                console.error(err)
                this.$$triggerWindowError(err)
            }
        }

        if (!handlers) return

        // 触发 addEventListener 绑定的事件
        if (handlers.length) {
            [...handlers].forEach(handler => {
                if (event && event.$$immediateStop) return
                try {
                    handler.call(this || null, event, ...args)
                } catch (err) {
                    console.error(err)
                    this.$$triggerWindowError(err)
                }
            })
        }

        // 触发 addEventListener 绑定到命名空间下的事件
        if (handlers._namespace) {
            Object.keys(handlers._namespace).forEach(namespace => {
                const namespaceHandlers = handlers._namespace[namespace]
                if (namespaceHandlers && namespaceHandlers.length) {
                    [...namespaceHandlers].forEach(handler => {
                        if (event && event.$$immediateStop) return
                        try {
                            handler.call(this || null, event, ...args)
                        } catch (err) {
                            console.error(err)
                            this.$$triggerWindowError(err)