When using backbone as the demo of todo’s official website, such a problem is always reported as uncaught error: a “url” propertyfunctionalmustbe specified. The final comparison is the discovery of localstorage: newbackone.localstorage (“todos-backone”), which resulted. Is this the reason? Why? Ask the superior to answer.
You have a loadbackbone.localstorage.jsPlug-ins?
If you want to use the LocalStorage function, you must additionally load this plug-in.