javascript - how to call the parent method of another method in dojo - Stack Overflow

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how could i call the parent method of another method in dojo. consider the following example:

var parent = declare(null,{

m1: function(arg){
console.log("parent.m1");
},
m2: function(arg){
console.log("parent.m2");
}

});`enter code here`

var child = declare(parent,{

m1: function(arg){
console.log("child.m1");
// how can i call parent.**m2** here directly without calling child.m2
},
m2: function(arg){
console.log("child.m2");
}

});

how can i call parent.m2 directly from child.m1 without invoking child.m2 at all

now suppose i define two modules as the following:

parentModule.js

    var parent = declare(null,{

    m1: function(arg){
    console.log("parent.m1");
    },
    m2: function(arg){
    console.log("parent.m2");
    }

    });
    return declare("ParentModule",[parent,child]);
//******************************************//
childModule.js

    return declare("child",null,{

    m1: function(arg){
    console.log("child.m1");
    // how can i call parent.**m2** here directly without calling child.m2
    //if we call ParentModule.prototype.m2.call(this,arguments); this will call child.m2
    //as child module override the parent now
    //also calling this.getInherited("m2",arguments); will call child.m2 !!!
    //how to fix that?
    },
    m2: function(arg){
    console.log("child.m2");
    }

    });

how could i call the parent method of another method in dojo. consider the following example:

var parent = declare(null,{

m1: function(arg){
console.log("parent.m1");
},
m2: function(arg){
console.log("parent.m2");
}

});`enter code here`

var child = declare(parent,{

m1: function(arg){
console.log("child.m1");
// how can i call parent.**m2** here directly without calling child.m2
},
m2: function(arg){
console.log("child.m2");
}

});

how can i call parent.m2 directly from child.m1 without invoking child.m2 at all

now suppose i define two modules as the following:

parentModule.js

    var parent = declare(null,{

    m1: function(arg){
    console.log("parent.m1");
    },
    m2: function(arg){
    console.log("parent.m2");
    }

    });
    return declare("ParentModule",[parent,child]);
//******************************************//
childModule.js

    return declare("child",null,{

    m1: function(arg){
    console.log("child.m1");
    // how can i call parent.**m2** here directly without calling child.m2
    //if we call ParentModule.prototype.m2.call(this,arguments); this will call child.m2
    //as child module override the parent now
    //also calling this.getInherited("m2",arguments); will call child.m2 !!!
    //how to fix that?
    },
    m2: function(arg){
    console.log("child.m2");
    }

    });

• javascript
• dojo

Share Improve this question Follow edited Mar 6, 2013 at 20:28 user1040987 asked Mar 6, 2013 at 14:18 user1040987user1040987 8322 silver badges99 bronze badges 1

• 1 I am confused by your hierarchy. Why is Parent extending the Child? Shouldn't it be the other way around? I posted a jsfiddle that shows how I think you should define your modules. – Craig Swing Commented Mar 6, 2013 at 21:23

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 7

When using dojo's declare you can use this.inherited(arguments) in the child function to call the parent function, see:

http://dojotoolkit/reference-guide/1.8/dojo/_base/declare.html#dojo-base-declare-safemixin

m1: function (arg) {
    console.log("child.m1");
    this.inherited(arguments);
}

You can use the javascript's prototype functionality to acplish what you are asking.

m1: function(arg){
    console.log("child.m1");
    parent.prototype.m2.apply(this, arguments);
},

More about prototype can be found here How does JavaScript .prototype work?

Here is an example of this working http://jsfiddle/cswing/f9xLf/

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