Repository: DioxusLabs/dioxus
File: packages/interpreter/src/unified_bindings.rs (Rust)

Code before:
    }
    fn replace_with(id: u32, n: u16) {
        "{const root = this.nodes[$id$]; let els = this.stack.splice(this.stack.length-$n$); if (root.listening) { this.removeAllNonBubblingListeners(root); } root.replaceWith(...els);}"
    }
    fn insert_after(id: u32, n: u16) {
        "{this.nodes[$id$].after(...this.stack.splice(this.stack.length-$n$));}"
    }
    fn insert_before(id: u32, n: u16) {
        "{this.nodes[$id$].before(...this.stack.splice(this.stack.length-$n$));}"
    }
    fn remove(id: u32) {
        "{let node = this.nodes[$id$]; if (node !== undefined) { if (node.listening) { this.removeAllNonBubblingListeners(node); } node.remove(); }}"
    }
    fn create_raw_text(text: &str) {
        "{this.stack.push(document.createTextNode($text$));}"
    }
    fn create_text_node(text: &str, id: u32) {
        "{let node = document.createTextNode($text$); this.nodes[$id$] = node; this.stack.push(node);}"
    }
    fn create_placeholder(id: u32) {
        "{let node = document.createElement('pre'); node.hidden = true; this.stack.push(node); this.nodes[$id$] = node;}"
    }

    fn new_event_listener(event_name: &str<u8, evt>, id: u32, bubbles: u8) {
        r#"{
            const event_name = $event_name$;
            const node = this.nodes[id];
            const bubbles = $bubbles$;

            if (node.listening) { node.listening += 1; } else { node.listening = 1; }
            node.setAttribute('data-dioxus-id', `\${id}`);

            this.createListener(event_name, node, bubbles);
        }"#
    }
    fn remove_event_listener(event_name: &str<u8, evt>, id: u32, bubbles: u8) {
        r#"{
            const event_name = $event_name$;
            const node = this.nodes[$id$];
            const bubbles = $bubbles$;

            node.listening -= 1;
            node.removeAttribute('data-dioxus-id');

            this.removeListener(node, event_name, bubbles);
        }"#
    }
    fn set_text(id: u32, text: &str) {
        "{this.nodes[$id$].textContent = $text$;}"
    }
    fn set_attribute(id: u32, field: &str<u8, attr>, value: &str, ns: &str<u8, ns_cache>) {

Review comment (performance):
This is a hot path, so we do some extra work for optimization. The `$$`'s mean the parameter is only used once and it is safe to inline the decoding logic into where the parameter is used

Code after:
    }
    fn pop_root() {
        "{this.stack.pop();}"
    }
    fn replace_with(id: u32, n: u16) {
        "{const root = this.nodes[$id$]; let els = this.stack.splice(this.stack.length-$n$); if (root.listening) { this.removeAllNonBubblingListeners(root); } root.replaceWith(...els);}"
    }
    fn insert_after(id: u32, n: u16) {
        "{let node = this.nodes[$id$];node.after(...this.stack.splice(this.stack.length-$n$));}"
    }
    fn insert_before(id: u32, n: u16) {
        "{let node = this.nodes[$id$];node.before(...this.stack.splice(this.stack.length-$n$));}"
    }
    fn remove(id: u32) {
        "{let node = this.nodes[$id$]; if (node !== undefined) { if (node.listening) { this.removeAllNonBubblingListeners(node); } node.remove(); }}"
    }
    fn create_raw_text(text: &str) {
        "{this.stack.push(document.createTextNode($text$));}"
    }
    fn create_text_node(text: &str, id: u32) {
        "{let node = document.createTextNode($text$); this.nodes[$id$] = node; this.stack.push(node);}"
    }
    fn create_placeholder(id: u32) {
        "{let node = document.createComment('placeholder'); this.stack.push(node); this.nodes[$id$] = node;}"
    }

    fn new_event_listener(event_name: &str<u8, evt>, id: u32, bubbles: u8) {
        r#"
            const node = this.nodes[id];
            if(node.listening){node.listening += 1;}else{node.listening = 1;}
            node.setAttribute('data-dioxus-id', `\${id}`);
            this.createListener($event_name$, node, $bubbles$);
        "#
    }
    fn remove_event_listener(event_name: &str<u8, evt>, id: u32, bubbles: u8) {
        "{let node = this.nodes[$id$]; node.listening -= 1; node.removeAttribute('data-dioxus-id'); this.removeListener(node, $event_name$, $bubbles$);}"
    }
    fn set_text(id: u32, text: &str) {
        "{this.nodes[$id$].textContent = $text$;}"
    }
    fn set_attribute(id: u32, field: &str<u8, attr>, value: &str, ns: &str<u8, ns_cache>) {
        "{let node = this.nodes[$id$]; this.setAttributeInner(node, $field$, $value$, $ns$);}"
    }
    fn remove_attribute(id: u32, field: &str<u8, attr>, ns: &str<u8, ns_cache>) {
        r#"{
            let node = this.nodes[$id$];
            if (!ns) {
                switch (field) {
                    case "value":
                        node.value = "";
                        node.removeAttribute("value");