Jira Template.js

const DEF_TEMPLATE = `<p><b>Problem:</b></p>
<p></p>
<p><b>Result:</b></p>
<p></p>
<p><b>Solution or Comments:</b></p>`;

function pasteTemplateTask(event) {
    const elm = event.target;
    const editor = elm.closest(".ProseMirror") || elm.querySelector(".ProseMirror");
    if (editor && editor.querySelector('[class*="placeholder"]')) { 
        editor.innerHTML = DEF_TEMPLATE;
    }
}
document.addEventListener("click", pasteTemplateTask);