> On 13 Apr 2017, at 10:32, aditya12...@gmail.com wrote: > > suppose i have created an element <my-element></my-element> having one > boolean property myvar..Currently Anyone Can modify this value from Chrome > console.i want to avoid it > > > ex > var ele=document.querySelector('my-element'); > ele.myvar=false;
You have three options: 1. Rename the property to `_myvar` to indicate that it is private (but this does not prevent access) 2. Do not expose the property (remove it from the `properties{}` object). Instead, use the value as a variable internal to your element and do not allow any assignment from outside the element. This does not update bindings automatically. In Polymer 1.x that will be similar to: (function() { Polymer({ is: ‘myelement’, properties: { // removed the myvar from here }, myvar: false, setMyvar: function(newval) { // allow setting myvar only when you approve of the change with tests in here if (allowedToSet) { this.myvar = newval; // update your DOM as required here, because this does not update bindings automatically } } }); }()); 3. Expose the property but do not use directly inside your element, referring instead to a variable which is assigned by an observer. This does not update bindings automatically. For Polymer 1.x this would be similar to: (function() { var myvar = false; Polymer({ is: ‘myelement’, properties: { myvar: { type: Boolean, value: false, observer: ‘onMyvarChanged’ } }, _myvar: false, onMyvarChanged(newValue, oldValue) { // allow setting myvar only when you approve of the change with tests in here if (allowedToSet) { this._myvar = newval; // update your DOM as required here, because this does not update bindings automatically } } } }()); Follow Polymer on Google+: plus.google.com/107187849809354688692 --- You received this message because you are subscribed to the Google Groups "Polymer" group. To unsubscribe from this group and stop receiving emails from it, send an email to polymer-dev+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/polymer-dev/47F281E4-2426-4BFE-8EF5-CBFFBB65B11D%40bowlhat.net. For more options, visit https://groups.google.com/d/optout.