WebDec 23, 2024 · You only need to use the Body.json () method if you are trying to resolve the promise from a Response stream. You may read more about it on the documentation. One use case of doing so would be when you are making a HTTP request using the fetch API, whereby you will have to call Body.json () to return the response body. WebJun 12, 2015 · In some cases (not in all), the SIMPLEST answer is to put "data" into a pair of square brackets (i.e. [data]) to change the items in the "data" into an array: $.getJSON ("json/products.json").done (function (data) { var allProducts = [data].map (function (item) { return new getData (item); }); });
Uncaught TypeError: not a function when calling method from data …
WebAug 14, 2024 · How to define type for a function callback (as any function type, not universal any) used in a method parameter 184 React JS - Uncaught TypeError: this.props.data.map is not a function WebApr 7, 2024 · Here you are modifying the array. So you can use forEach. addCartBtns.forEach (function (cartBtn) { console.log (cartBtn.textContent="shop now"); }); Note: forEach will work fine if NodeList is not converted to array. Here, you don't actually need map, forEach will do, and NodeList has a forEach. Therefore: crystal\u0027s 8o
TypeError: data.filter is not a function - Stack Overflow
WebJul 23, 2024 · First, check that the data is actually an array. Second, make sure to return the data in your promise by .then (data=> { console.log (data); return data; }) (note that the curly braces is necessary). By console.log but not return anything, you are not getting any value from that promise chain (thus the undefined) – Bao Huynh Lam. WebFeb 21, 2024 · The correct function name is getElementById: const x = document.getElementById("foo"); Function called on the wrong object For certain methods, you have to provide a (callback) function and it will work on specific objects only. In this example, Array.prototype.map () is used, which will work with Array objects only. WebJul 11, 2024 · The following is wrong: function saveFriend () { const newData = [...data, newFriend]; setData (newData); } function saveFriend () { setData ( [...data, newFriend]); } The reason why this doesn't work is, Array.push () returns the length of the array, thereby, setting the data to a number. And an integer doesn't have the map () function so you ... crystal\\u0027s 8k