sliceAt-jsstyle.js

function sliceAt(initial_string, target) {
    var index = initial_string.indexOf(target);
    if (index !== -1) {
        switch (index) {
            case 0: return initial_string.substring(index + target.length);
            case (initial_string.length - 1): return initial_string.substring(index, target.length - 1);
        }
        var first_part = '';
        var second_part = '';
        first_part = initial_string.substring(0, index);
        second_part = initial_string.substring(index + 1);
        return "" + first_part + second_part;
    }
    return null;
}