How to set value in LocalStorage of WebView JavaFX

Question

I'm trying to save some values in the LocalStorage of WebView of JavaFX. Is it supported by WebView? About html5test.com, the LocalStorage is enabled, but I don't find any solution to save data with Javascript in the LocalStorage.

AFAIK 'coockies' (which the local storage basically is) and the javafx webview (or java in general) are not a perfect combination. Look at [this question](https://stackoverflow.com/questions/45827482/access-all-the-cookies-from-a-javafx-webview) for example. Unfortunatly there are many more simular questions both related and unrelated to the javafx webview, all without a good solution or workaround. — n247s, Nov 04 '18 at 20:48

Rasoul Miri · Answer 1 · 2020-12-07T00:22:34.527

0

you can use this:

JSObject js = (JSObject)webEngine.executeScript("localStorage");

for example, in local storage, we have refreshTime with the value 1000.

for getting

println(js.getMember("refreshTime")) // print 1000

for setting

js.setMember("refreshTime",2000)

JSObject from import netscape.javascript.JSObject;

edited Dec 07 '20 at 00:22

answered Dec 07 '20 at 00:12

Rasoul Miri

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score 0 · Answer 2 · answered Jun 21 '23 at 19:09

using scripts below could achieve the goal.

function defineProperty(obj, field, newValue, writable = true) {
        Object.defineProperty(obj, field, {
            writable: writable,
            value: newValue,
        });
    }

    var localStorageMock = function () {
        const obj = {};
        return {
            getItem: function (key) {
                let value = obj[key];
                if (value === undefined)
                    return null;
                else
                    return obj[key] + "";
            },
            setItem: function (key, value) {
                obj[key] = value;
            },
            removeItem: function (key) {
                delete obj[key];
            },
            clear: function () {
                Object.keys(obj).forEach(key => delete obj[key]);
            },
            getKeys: function () {
                return Object.keys(obj);
            },
            getValues: function () {
                return Object.values(obj);
            }

        }

    }

 defineProperty(window, 'localStorage', localStorageMock(), false);
//do some test
 window.localStorage.setItem("a",110);
 console.log("window.localStorage.getItem('a')"+window.localStorage.getItem('a'));

How to set value in LocalStorage of WebView JavaFX

2 Answers2