Document Library Link.json

{
  "elmType": "div",
  "children": [
    {
      "elmType": "span",
      "style": {
        "padding-right": "8px"
      },
      "txtContent": "=if(length([$Title]),[$Title],substring([$FileLeafRef],0,indexOf([$FileLeafRef],'.'))"
    },
    {
      "elmType": "a",
      "attributes": {
        "iconName": "Link",
        "class": "sp-field-quickAction",
        "href": "=substring(@currentWeb,0,indexOf(substring(@currentWeb,8,1000),'/')+8) + [$FileRef]",
        "target": "_blank"
      },
      "style": {
        "text-decoration": "none"
      }
    }
  ]
}