Private Readonly_Private_Private_Private_Invoked when the component is added to the document's DOM.
In connectedCallback() you should setup tasks that should only occur when
the element is connected to the document. The most common of these is
adding event listeners to nodes external to the element, like a keydown
event handler added to the window.
connectedCallback() {
super.connectedCallback();
addEventListener('keydown', this._handleKeydown);
}
Typically, anything done in connectedCallback() should be undone when the
element is disconnected, in disconnectedCallback().
Invoked on each update to perform rendering tasks. This method may return
any value renderable by lit-html's ChildPart - typically a
TemplateResult. Setting properties inside this method will not trigger
the element to update.
StaticstylesArray of styles to apply to the element. The styles should be defined using the css tag function, via constructible stylesheets, or imported from native CSS module scripts.
Note on Content Security Policy:
Element styles are implemented with <style> tags when the browser doesn't
support adopted StyleSheets. To use such <style> tags with the style-src
CSP directive, the style-src value must either include 'unsafe-inline' or
nonce-<base64-value> with <base64-value> replaced be a server-generated
nonce.
To provide a nonce to use on generated <style> elements, set
window.litNonce to a server-generated nonce in your page's HTML, before
loading application code:
<script>
// Generated and unique per request:
window.litNonce = 'a1b2c3d4';
</script>
Checkout page — reads an optional discount code from the URL (?code=X), calls the checkout API and redirects to the LucaStars PSP.
OOP — INHERITANCE: CheckoutPageComponent erft van LitElement. LitElement regelt de web component lifecycle (connectedCallback, render etc.) Wij hoeven alleen te definiëren wat er anders is voor onze pagina.
OOP — ENCAPSULATION: _loading en _error zijn private state-velden. Van buiten de component zijn ze niet bereikbaar. @state() zorgt dat Lit de UI opnieuw rendert als een waarde verandert.
Author
Abdelrahmen Sobhy