How to restrict max value on html5 number input on manual entry

问题

Free jqgrid column is defined to use html5 number input type like

{ name: "amount", width: 62, template: "number",
             formatter: "number", formatoptions: {decimalSeparator:",", thousandsSeparator: " ", decimalPlaces: 4, defaultValue: '0.0000'},
               editoptions: {
                   maxlength; 4
                   type: "number", 
                   max: 9999
               } },

It allows to enter numbers from keyboard greater than 9999. max: 9999 affects only to entry using spinner.

How to fix this so that keyboard entry cannot exceed 9999 ?

testcase is at

http://jsfiddle.net/jhckz7rr/3/

It allows to manually enter numbers greater that 9999 into Amount column. How to restrict manual entry to 9999 ? I tried also to use string max value max: '9999' but problem persists.

If input type is text, input respects maxlength value.

回答1:

Try to use something like the following

{
    name: "amount",
    width: 62,
    template: "number", // formatter: "number"
    formatoptions: {
        decimalSeparator: ",",
        thousandsSeparator: " ",
        decimalPlaces: 2,
        defaultValue: "0,00"
    },
    editoptions: {
        maxlength: 7,
        type: "number",
        max: "9999",
        dataEvents: [
            {
                type: "blur",
                fn: function (e) {
                        if (e.target.checkValidity()) {
                            $(e.target).removeClass("ui-state-error");
                        } else {
                            $(e.target).addClass("ui-state-error");
                            alert(e.target.validationMessage);
                            $(e.target).focus();
                        }
                    }
            }
        ]
    }

}

The above code calls checkValidity() method of <input type="number">. Of cause you need to include additional tests in the code like validation that e.target.checkValidity is a function (for the case of executing in old web browser) and some other. The above code just shows the main idea of validation which uses functionality of <input type="number">.

See the demo http://jsfiddle.net/OlegKi/jhckz7rr/8/, which works for both inline editing and form editing.

回答2:

Create validation on input with jQuery.

Event listeners are attached on edit click, and removed on save click. I used setTimeout, to be synchronized with free-jqgrid elements manipulation - as the proper solution will be to extend free-jqgrid functionality

function restrictMax(){

    var max = parseFloat($(this).attr('max'))
    var value = parseFloat($(this).val())
    if($(this).val() > max){
        $(this).val(max)
    }
}
setTimeout(function(){
    $('.fa-pencil').click(function(){ //click on edit
        var thatParent = $(this).closest('tr')
        setTimeout(function(){

            thatParent.find('input[type="number"]').on('input',restrictMax)
        },0);
    })
    $('.fa-floppy-o').click(function(){ //click on save
        var thatParent = $(this).closest('tr')
        setTimeout(function(){
            thatParent.find('input[type="number"]').off('input',restrictMax)
        },0)
    })

},0)

http://jsfiddle.net/jhckz7rr/6/

来源：https://stackoverflow.com/questions/33853914/how-to-restrict-max-value-on-html5-number-input-on-manual-entry

标签

javascript

jquery

html5

jqgrid

free-jqgrid