backup
can/observe/backupSave the values of the properties of an Observe.
observe.backup()
backup
backs up the current state of the properties of an Observe and marks
the Observe as clean. If any of the properties change value, the original
values can be restored with can.Observe.prototype.restore
:
Returns
{can.Observe}
The Observe, for chaining.
var recipe = new can.Observe({
title: 'Pancake Mix',
yields: '3 batches',
ingredients: [{
ingredient: 'flour',
quantity: '6 cups'
},{
ingredient: 'baking soda',
quantity: '1 1/2 teaspoons'
},{
ingredient: 'baking powder',
quantity: '3 teaspoons'
},{
ingredient: 'salt',
quantity: '1 tablespoon'
},{
ingredient: 'sugar',
quantity: '2 tablespoons'
}]
});
recipe.backup();
recipe.attr('title', 'Flapjack Mix');
recipe.title; // 'Flapjack Mix'
recipe.restore();
recipe.title; // 'Pancake Mix'