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TwitterisDirty
Check whether an Observe has changed since the last time it was backed up.
map.isDirty([deep])
isDirty checks whether any properties have changed value or whether any properties have
been added or removed since the last time the Observe was backed up. If deep is true,
If the Observe has never been backed up, isDirty returns undefined.
isDirty will include nested Observes in its checks.
Parameters
- deep
{bool}:whether to check nested Observes
Returns
{bool}:
Whether the Observe has changed since the last time it was [can.Map.backup.prototype.backup backed up].
Example
import DefineMap from "can-define/map/map";
import defineBackup from "can-define-backup";
const recipe = new DefineMap( "Recipe", {
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"
} ]
} );
defineBackup(recipe);
recipe.isDirty(); // false
recipe.backup();
recipe.title = "Flapjack Mix";
recipe.isDirty(); // true
recipe.restore();
recipe.isDirty(); // false
recipe.ingredients.0.quantity = "7 cups";
recipe.isDirty(); // false
recipe.isDirty(true); // true
recipe.backup();
recipe.isDirty(); // false
recipe.isDirty(true); // false