You can pass plugin options using data-options attribute. Please make sure to use valid json code.
Plugin Docs JSON Formatter<input type="text" class="range-slider form-control"
data-options='{
"type": "double",
"grid": true,
"min": -1000,
"max": 1000,
"from": -500,
"to": 500,
"step": 250
}'/>