解耦应用逻辑/事件处理程序

原生函数

function handleKeyPress(event) {
    if (event.KeyCode == 13) {
        var target = EventUtil.getTarget(event);
        var value = 5 * parseInt(target.value);
        if (value > 10) {
            document.getElementById("error-msg").style.display = "block";
        }
    }
}

解耦后的函数

function validateValue(value) {
    value = 5 * parseInt(value);
    if (value > 10) {
        document.getElementById("error-msg").style.display = "block";
    }
}

function handleKeyPress(event) {
    if (event.KeyCode == 13) {
        var target = EventUtil.getTarget(event);
        validateValue(target.value);
    }
}