返回javascript函数的true / false值,然后根据它做一些事情

时间:2022-12-04 20:15:00

I'm building a contact form and I need help with the jQuery validator.

我正在构建一个联系表单,我需要有关jQuery验证器的帮助。

function contactform() {
    $("form #submit").on("click", function() {
        $("form input").removeClass("error");
        validator();
        // 3rd action goes here
    });
});

validator() checks to see if any input is left empty, and if so it adds an error class to it:

validator()检查是否有任何输入为空,如果是,则为其添加错误类:

function validator() {
    $("form input").each(function() {
        var value = $(this).val();
        if (value.length <= 0) {
            $(this).addClass("error");
            return false;
        }
    });
});

Now, for the 3rd action in contactform() I want to say that if validator() = true (i.e. there no inputs that are empty), then continue on to the next code.

现在,对于contactform()中的第3个动作,我想说如果validator()= true(即没有空的输入),那么继续下一个代码。

I can't seem to return the value of validator(). Does anybody know the best way to do this?

我似乎无法返回validator()的值。有人知道最好的方法吗?

3 个解决方案

#1


8  

Here is another solution using filter method:

这是使用过滤方法的另一种解决方案

function validator() {
    return $("form input").filter(function() {
        return $.trim(this.value).length == 0;
    }).addClass("error").length == 0;
});

function contactform() {
    ...
    if (validator()) {
        // it's OK
    } else {
        // there are errors
    }
}

UPDATE: Awesomely updated with the help of @am_not_i_am. Thanks!

更新:在@am_not_i_am的帮助下进行了极大的更新。谢谢!

#2


4  

The problem you seem to encounter is that you have a nested function and closure, which prevents you from returning the value directly.

您似乎遇到的问题是您有一个嵌套的函数和闭包,这会阻止您直接返回值。

Something like that should do the trick:

像这样的东西应该做的伎俩:

function validator() {
    var result=true;
    $("form input").each(function() {
        var value = $(this).val();
        if (value.length <= 0) {
            $(this).addClass("error");
            result = false;
        }
    });
    return result;
});

#3


3  

function validator() {
    var result = true;
    $("form input").removeClass("error");
    $('form input').each(function() {
           if(!$.trim(this.value)) {
             $(this).addClass('.error');
             result = false;  
           }
     });
    return result;
}


function contactform() {
    $("form #submit").on("click", function() {
        if(validator()) { // pass the validation

        } else { // fail validation

        }
        // 3rd action goes here
    });
});

#1


8  

Here is another solution using filter method:

这是使用过滤方法的另一种解决方案

function validator() {
    return $("form input").filter(function() {
        return $.trim(this.value).length == 0;
    }).addClass("error").length == 0;
});

function contactform() {
    ...
    if (validator()) {
        // it's OK
    } else {
        // there are errors
    }
}

UPDATE: Awesomely updated with the help of @am_not_i_am. Thanks!

更新:在@am_not_i_am的帮助下进行了极大的更新。谢谢!

#2


4  

The problem you seem to encounter is that you have a nested function and closure, which prevents you from returning the value directly.

您似乎遇到的问题是您有一个嵌套的函数和闭包,这会阻止您直接返回值。

Something like that should do the trick:

像这样的东西应该做的伎俩:

function validator() {
    var result=true;
    $("form input").each(function() {
        var value = $(this).val();
        if (value.length <= 0) {
            $(this).addClass("error");
            result = false;
        }
    });
    return result;
});

#3


3  

function validator() {
    var result = true;
    $("form input").removeClass("error");
    $('form input').each(function() {
           if(!$.trim(this.value)) {
             $(this).addClass('.error');
             result = false;  
           }
     });
    return result;
}


function contactform() {
    $("form #submit").on("click", function() {
        if(validator()) { // pass the validation

        } else { // fail validation

        }
        // 3rd action goes here
    });
});