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import { createDefer } from './create-defer';

export function evaluate(script: string) {

const scriptEl = document.createElement('script');

scriptEl.text = script;

document.head.appendChild(scriptEl);

document.head.removeChild(scriptEl);

}

export function load(url: string) {

const node: any = document.createElement('script');

// node.setAttribute('crossorigin', 'anonymous');

node.onload = onload;

node.onerror = onload;

const i = createDefer();

function onload(e: any) {

node.onload = null;

node.onerror = null;

if (e.type === 'load') {

i.resolve();

} else {

i.reject();

}

// document.head.removeChild(node);

// node = null;

}

// node.async = true;

node.src = url;

document.head.appendChild(node);

return i.promise();

}

export function evaluateExpression(expr: string) {

// eslint-disable-next-line no-new-func

const fn = new Function(expr);

return fn();

}

export function newFunction(args: string, code: string) {

try {

// eslint-disable-next-line no-new-func

return new Function(args, code);

} catch (e) {

console.warn('Caught error, Cant init func');

return null;

}

}