@visactor/vgrammar-core/es/view/events.js

VGrammar is a visual grammar library

import { isObject } from "@visactor/vutils";

export function prevent(eventConfig, type) {
    const def = eventConfig.defaults, prevent = def.prevent, allow = def.allow;
    return !1 !== prevent && !0 !== allow && (!0 === prevent || !1 === allow || (prevent ? prevent[type] : !!allow && !allow[type]));
}

export function permit(eventConfig, key, type) {
    const rule = null == eventConfig ? void 0 : eventConfig[key];
    return !(!1 === rule || isObject(rule) && !rule[type]);
}
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