problem: #javascript and #php file upload error:

"Missing boundary in multipart/form-data POST data"

solution:

                    // remove this line
xhr.setRequestHeader("Content-Type", "multipart/form-data");
                  

...it set by browser so you do not need it

nice list of handy #javascript tricks when working with arrays or objects... spread operator, filter unique array values, split text into array, combine / merge multiple objects into one object, combine / merge multiple arrays into one array, change object property value ....

how to create chrome (no connection) dino game just by using #HTML #CSS and #JavaScript

#JavaScript convert Array to String:

                    const numberArray = ["one", "two", "three", "four"];
const output = numberArray.toString();
// output: one,two,three,four
                  

you might need one of these #JavaScript sliders

hey 🤗 checkout my post about spread operator in #JavaScript AKA 3 dots(...) operator

check out my post about how to set up tracking in #JavaScript or #Angular using #dataLayer and #GoogleAnalytics with #GoogleTagManager