obsidian.templater.css.pane.full-screen.js

<%*
const curPane = document.querySelector(`.mod-active.workspace-leaf`);
let isMax = false;
if(curPane) {
    if(curPane.style.minWidth) {
        if(curPane.style.minWidth === `100%`){isMax = true}
    }
}

const rootPanesCont = document.querySelector(`.workspace-split.mod-root`);
let allMainPanes;
if(rootPanesCont){allMainPanes = rootPanesCont.querySelectorAll(`.workspace-leaf`)}
if(allMainPanes) {
    allMainPanes.forEach(eachLeaf => {
        let isActivePane = eachLeaf.classList.contains(`mod-active`);
        if(isMax) {
            eachLeaf.style.maxWidth = null;
            eachLeaf.style.padding = null;
            eachLeaf.style.minWidth = null;
            eachLeaf.style.minHeight = null;
            eachLeaf.parentElement.style.maxWidth = null;
            eachLeaf.parentElement.style.padding = null;
            eachLeaf.parentElement.style.minWidth = null;
            eachLeaf.parentElement.style.minHeight = null;
            eachLeaf.parentElement.querySelector(`.workspace-leaf-resize-handle`).style.maxWidth = null;
        } else {
            if(!isActivePane){
                eachLeaf.style.maxWidth = `0`;
                eachLeaf.style.padding = `0`;
                if(!eachLeaf.parentElement.classList.contains(`mod-root`)) {
                    if(!eachLeaf.parentElement.querySelector(`.mod-active`)) {
                        eachLeaf.parentElement.style.maxWidth = `0`;
                        eachLeaf.parentElement.style.padding = `0`;
                    } else {
                        eachLeaf.parentElement.style.minWidth = `100%`;
                        eachLeaf.parentElement.style.minHeight = `100%`;
                    }
                }
            } else {
                eachLeaf.style.minWidth = `100%`;
                eachLeaf.style.minHeight = `100%`;
                eachLeaf.parentElement.querySelector(`.workspace-leaf-resize-handle`).style.maxWidth = `0`;
            }
        }
    })
}
%>