Question

136

How to set object property (of object property of..) given its string name in JavaScript?

rated 0 times [ 137] [ 1] / answers: 1 / hits: 35469 / 12 Years ago, wed, december 5, 2012, 12:00:00

Suppose we are only given

var obj = {};

var propName = foo.bar.foobar;

How can we set the property obj.foo.bar.foobar to a certain value (say hello world)?
So I want to achieve this, while we only have the property name in a string:

obj.foo.bar.foobar = hello world;

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leiaf

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2 Years ago

answered 12 Years ago carolynt · Accepted Answer

function assign(obj, prop, value) {

    if (typeof prop === string)

        prop = prop.split(.);



    if (prop.length > 1) {

        var e = prop.shift();

        assign(obj[e] =

                 Object.prototype.toString.call(obj[e]) === [object Object]

                 ? obj[e]

                 : {},

               prop,

               value);

    } else

        obj[prop[0]] = value;

}



var obj = {},

    propName = foo.bar.foobar;



assign(obj, propName, Value);