Can construct function with memoization [JAVASCRIPT]

can-construct.js

/// Write a function 'canConstruct(target, wordBank)' that accepts a
/// target string and an array of strings.

/// The function should return a boolean indicating whether or not the
/// 'target' can be constructed by concatenating elements of the
/// 'wordBank' array.

/// You may reuse elements of ‘wordBank' as many times as needed.

const canConstruct = (target, wordBank, memory = {}) => {
    // Check in memory.
    if (target in memory) return memory[target];

    // Return obvious values to stop recursion.
    if (target === '') return true;

    // Iterate through wordBank array
    for (let word of wordBank) {
        if (target.indexOf(word) === 0) {
            const suffix = target.slice(word.length);
            if (canConstruct(suffix, wordBank, memory) === true) {
                memory[target] = true;
                return true;
            };
        }
    }
    memory[target] = false;
    return false;
}


console.log(canConstruct('abcdef', ['ab', 'abc', 'cd', 'def', 'abcd'])); // true
console.log(canConstruct('skateboard', ['bo', 'rd', 'ate', 't', 'ska', 'sk', 'boar'])); // false
console.log(canConstruct('enterapotentpot', ['a', 'p`', 'ent`', 'enter`', 'ot`', 'o', 't'])); // false