lib/rules/no-await-in-loop.js
function isBoundary(node) {
    const t = node.type;

    return (
        t === "FunctionDeclaration" ||
        t === "FunctionExpression" ||
        t === "ArrowFunctionExpression" ||

        /*
         * Don't report the await expressions on for-await-of loop since it's
         * asynchronous iteration intentionally.
         */
        (t === "ForOfStatement" && node.await === true)
    );
}
function isBoundary(node) {
    const t = node.type;

    return (
        t === "FunctionDeclaration" ||
        t === "FunctionExpression" ||
        t === "ArrowFunctionExpression" ||

        /*
         * Don't report the await expressions on for-await-of loop since it's
         * asynchronous iteration intentionally.
         */
        (t === "ForOfStatement" && node.await === true)
    );
}
function isBoundary ( node ) { const t = node . type ; return ( t === "FunctionDeclaration" || t === "FunctionExpression" || t === "ArrowFunctionExpression" || /*
         * Don't report the await expressions on for-await-of loop since it's
         * asynchronous iteration intentionally.
         */ ( t === "ForOfStatement" && node . await === true ) ) ; }
Check whether it should stop traversing ancestors at the given node.
@param {ASTNode} node A node to check.
@returns {boolean} `true` if it should stop traversing.
Check whether it should stop traversing ancestors at the given node .