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loadBehavior option visualised

<- [ Back to add-javascript README ]

import { addScript, loadScript, makeHook } from "add-javascript";

addScript("https://www.example.com/script.js", {
  loadBehavior: "async" // or "defer" or "blocking"
});

await loadScript("https://www.example.com/script.js", {
  loadBehavior: "async" // or "defer" or "blocking"
});

const useScript = makeHook(React);
function Component() {
  useScript("https://www.example.com/script.js", {
    loadBehavior: "async" // or "defer" or "blocking"
  });
}

If the diagrams below aren't being rendered, view this page on Github.

---
displayMode: compact
---

gantt
title "blocking"
dateFormat  YYYY-MM-DD
axisFormat .

section Parsing
HTML parsing       :crit, a1, 2023-05-01, 2023-05-02
HTML parsing paused:after a1, 2023-05-02, 2023-05-04
HTML parsing       :crit, after a2, 2023-05-04, 2023-05-06

section Download
Script download    :active, after a1, 2023-05-02, 2023-05-03

section Execution
Script execution   :crit, active, after a3, 2023-05-03, 2023-05-04
Loading
---
displayMode: compact
---

gantt
title "async"
dateFormat  YYYY-MM-DD
axisFormat .

section Parsing
HTML parsing       :crit, a1, 2023-05-01, 2023-05-03
HTML parsing paused:after a3, 2023-05-03, 2023-05-04
HTML parsing       :crit, after a2, 2023-05-04, 2023-05-05

section Download
Script download    :active, after a1, 2023-05-02, 2023-05-03

section Execution
Script execution   :crit, active, after a3, 2023-05-03, 2023-05-04
Loading
---
displayMode: compact
---

gantt
title "defer"
dateFormat  YYYY-MM-DD
axisFormat .

section Parsing
HTML parsing       :crit, a1, 2023-05-01, 2023-05-04

section Download
Script download    :active, a2, 2023-05-02, 2023-05-03

section Execution
Script execution   :crit, active, after a1, 2023-05-04, 2023-05-05
Loading

Props to growingwiththeweb.com for the original visualisation and BBSS for the inspiration to use Mermaid Gantt charts to represent them.