确定成功了.只需将元素的宽度设置为200.它的公差为15px，因此，如果元素在185和215px之间，它将捕捉到200px.

Ok got it working. Simply set the width of the element to 200. It has a tolerance of 15px so if the element is between 185 and 215px it will snap to 200px.

$("#left").resizable({
minWidth: 60,
handles: "e",
resize: function (event, ui) {
    if(Math.abs(200 - ui.size.width) <= 15){
        $("#left").css("width", 200);
    }
}